What are the 3 open connectors on the back wall?
3 connectors on back wall, one has black and red wires going to the connector. What is it's purpose and what fuse protects it?

Largely used as a people mover, the Chevrolet Express is a proven design that dates back more than 20 years. In other words, if you’re looking for the most modern shuttle van, this isn’t it. If value is a concern, read on. The Express was last redesigned more than 20 years ago, and that shows in its interior and exterior styling, but people-moving needs haven’t evolved much during that period, so it’s still worth a look. It will accommodate up to 15 passengers, depending on configuration.
Two wheelbases—135.2 and 155.1 inches—are each offered with three engine options. The base engine is a 4.3-liter V6 rated at 276 horsepower and 298 lb-ft of torque. A turbodiesel 2.8-liter 4-cylinder engine rated at 181 hp and 369 lb-ft of torque is also available. Both are paired with an 8-speed automatic transmission. A gasoline-powered 6.0-liter V8 rated at 341 hp and 373 lb-ft of torque is optional, as is a second 6.0-liter V8 that operates on either propane or compressed natural gas. Both V8s are mated to a 6-speed automatic transmission. Every Chevy Express passenger van has rear-wheel drive (RWD) and comes with a 3.42:1 axle ratio.
Depending on your hauling needs, the Express comes in two configurations (2500 and 3500) with different payload capacities. The 2500, which is available only in the 135-inch wheelbase, is capable of handling payloads up to 2,770 pounds, while the heavier-duty 3500 will handle loads up to 3,760 pounds (135-inch wheelbase only). Towing capacity for the Express passenger van ranges between 6,700 and 9,600 pounds depending on configuration.
Because it’s essentially a commercial vehicle, the Express is fitted with spartan amenities. Two trim levels are available, LS and LT. LS trims come standard with 12-passenger seating over 4 rows. Vinyl seats are standard, as is an AM/FM audio system with an MP3 player. Rubberized vinyl flooring is standard, as are air conditioning front and rear and a rear auxiliary heater. Stepping up to the (also 12-passenger) LT trims adds full cloth seating and carpet to the floor. Chrome bumpers are included at the LT level, as are a forward-collision alert and lane-departure warning. LS trims are available with multiple package options, including the Safety Package, Communications Package, and Enhanced Convenience Package, all of which upgrade its engine to the 6.0-liter V8 in addition to adding safety, communication, or convenience features. Both trims come standard with 4G LTE connectivity.
Although the Express will move people effectively, it’s worth considering any of the more modern options if you’re shopping in this segment. The Nissan NV, Ford Transit, and Mercedes-Benz Sprinter all offer similar people-moving abilities coupled to less-ancient architecture, though they are more expensive. The Express also lacks a high-roof option, which means adults will always need to crouch when moving around inside. Nonetheless, the Express is a proven design and one that offers value over newer and more costly options.
3 connectors on back wall, one has black and red wires going to the connector. What is it's purpose and what fuse protects it?
Air Conditioning
Single front air conditioning zones · Single rear air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: deactivation switch · Front side airbags · Rear side curtain airbags
Audio System
Antenna Type: mast · Auxiliary audio input: jack · AM/FM radio · Total Number of Speakers: 2
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.8 · Front brake width: 1.5 · Front brakes: ventilated disc · Rear brake diameter: 13.0 · Rear brake width: 1.14 · Rear brakes: ventilated disc
Comfort Features
Armrests: dual front · Floor Material: rubber · Steering wheel trim: urethane
Convenience Features
Assist handle: front · Cupholders: front · Front power outlet: 115V · Power outlet(s): 12V front · Reading lights: front · Storage: in dash · Vanity mirrors: driver
Driver Seat
Manual adjustments: 4
Drivetrain
Axle ratio: 3.42
Engine
Alternator: 150 amps · Battery: 600 CCA · Oil cooler: auxiliary
Exterior Features
Door handle color: black · Exhaust tip color: stainless-steel · Front bumper color: black · Grille color: black · License plate bracket: front · Mirror color: black · Rear bumper color: black · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out · Window trim: black
Headrests
Front headrests: integrated · Number of front headrests: 2
Instrumentation
Fuel economy display: MPG · Warnings and reminders: maintenance reminder
Lights
Headlights: Halogen
Mirrors
Exterior mirrors: manual · Inside rearview mirror: manual day/night
Passenger Seat
Manual Adjustments: 4
Rear Seats
Type: bench
Roof
OEM roof height: undefined
Safety
Camera system: rearview · Child seat anchors: LATCH system · Rearview monitor: in mirror
Seatbelts
Fourth row seatbelts: 3-point · Front seatbelts: 3-point · Seatbelt pretensioners: front · Second row seatbelts: 3-point · Third row seatbelts: 3-point
Seats
Driver seat manual adjustments: reclining · Fourth row seat type: 50-50 split bench · Front seat type: bucket · Passenger seat manual adjustments: reclining · Upholstery: vinyl
Security
Power door locks: anti-lockout
Spare Tire
Mount Location: underbody
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 17.2 · Turns lock-to-lock: 3.0
Suspension
Front Arm Type: short and long arm (SLA) · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Stabilizer Bar: diameter 35 mm · Front Suspension Classification: independent · Rear Shock Type: gas shock absorbers · Rear Spring Type: leaf springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-leaf
Telematics
Driver assistance app: roadside assistance · Satellite communications: OnStar · Smart device app compatibility: myChevrolet with Connected Access · Smart device app function: maintenance status · Wifi: hotspot
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent
Air Conditioning
Single front air conditioning zones · Single rear air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: deactivation switch · Front side airbags · Front side curtain airbags
Audio System
Antenna Type: mast · Auxiliary audio input: jack · AM/FM radio · Total Number of Speakers: 2
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.8 · Front brake width: 1.5 · Front brakes: ventilated disc · Rear brake diameter: 13.0 · Rear brake width: 1.14 · Rear brakes: ventilated disc
Comfort Features
Armrests: dual front · Floor Mat Material: vinyl/rubber · Floor Material: carpet · Floor Mats: front · Steering wheel trim: urethane
Convenience Features
Assist handle: front · Cupholders: 3 · Front power outlet: 115V · Multi-function remote: keyless entry with panic alarm · Power outlet(s): 12V front · Reading lights: front · Steering wheel: tilt-adjustable · Steering wheel mounted controls: cruise controls · Storage: in dash · Vanity mirrors: driver
Driver Seat
Manual adjustments: 4
Drivetrain
Axle ratio: 3.42
Engine
Alternator: 150 amps · Battery: maintenance-free · Oil cooler: auxiliary
Exterior Features
Door handle color: black · Exhaust tip color: stainless-steel · Front bumper color: chrome · Grille color: black with chrome accents · License plate bracket: front · Mirror color: black · Rear bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out · Window trim: black
Headrests
Front headrests: integrated · Number of front headrests: 2
Instrumentation
Fuel economy display: range · Warnings and reminders: low fuel level
Lights
Headlights: Auto on/off
Mirrors
Exterior mirrors: manual · Inside rearview mirror: manual day/night
Passenger Seat
Manual Adjustments: 4
Rear Seats
Type: bench
Roof
OEM roof height: undefined
Safety
Camera system: rearview · Child seat anchors: LATCH system · Pre-Collision Warning System: visual warning · Rearview monitor: in mirror
Seatbelts
Fourth row seatbelts: 3-point · Front seatbelts: 3-point · Seatbelt pretensioners: front · Second row seatbelts: 3-point · Third row seatbelts: 3-point
Seats
Driver seat manual adjustments: reclining · Fourth row seat type: 50-50 split bench · Front seat type: bucket · Passenger seat manual adjustments: reclining · Upholstery: cloth
Security
Power door locks: anti-lockout
Spare Tire
Mount Location: underbody
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 17.2 · Turns lock-to-lock: 3.0
Suspension
Front Arm Type: short and long arm (SLA) · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Stabilizer Bar: diameter 35 mm · Front Suspension Classification: independent · Rear Shock Type: gas shock absorbers · Rear Spring Type: leaf springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-leaf
Telematics
Driver assistance app: roadside assistance · Satellite communications: OnStar · Smart device app compatibility: myChevrolet with Connected Access · Smart device app function: maintenance status · Wifi: hotspot
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent
Air Conditioning
Single front air conditioning zones · Single rear air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: deactivation switch · Front side airbags · Third row side curtain airbags
Audio System
Antenna Type: mast · Auxiliary audio input: jack · AM/FM radio · Total Number of Speakers: 2
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.8 · Front brake width: 1.5 · Front brakes: ventilated disc · Rear brake diameter: 13.5 · Rear brake width: 1.6 · Rear brakes: ventilated disc
Comfort Features
Armrests: dual front · Floor Material: rubber · Steering wheel trim: urethane
Convenience Features
Assist handle: front · Cupholders: 3 · Front power outlet: 115V · Power outlet(s): 12V front · Reading lights: front · Steering wheel: tilt-adjustable · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: illuminated passenger
Driver Seat
Manual adjustments: 4
Drivetrain
Axle ratio: 3.42
Engine
Alternator: 150 amps · Battery: maintenance-free · Oil cooler: auxiliary
Exterior Features
Door handle color: black · Exhaust tip color: stainless-steel · Front bumper color: black · Grille color: black · License plate bracket: front · Mirror color: black · Rear bumper color: black · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out · Window trim: black
Headrests
Front headrests: integrated · Number of front headrests: 2
Instrumentation
Fuel economy display: range · Warnings and reminders: maintenance reminder
Lights
Headlights: Auto on/off
Mirrors
Exterior mirrors: manual · Inside rearview mirror: manual day/night
Passenger Seat
Manual Adjustments: 4
Rear Seats
Type: bench
Roof
OEM roof height: undefined
Safety
Camera system: rearview · Child seat anchors: LATCH system · Rearview monitor: in mirror
Seatbelts
Fourth row seatbelts: 3-point · Front seatbelts: 3-point · Seatbelt pretensioners: front · Second row seatbelts: 3-point · Third row seatbelts: 3-point
Seats
Driver seat manual adjustments: reclining · Fourth row seat type: 50-50 split bench · Front seat type: bucket · Passenger seat manual adjustments: reclining · Upholstery: vinyl
Security
Power door locks: anti-lockout
Spare Tire
Mount Location: underbody
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 17.2 · Turns lock-to-lock: 3.0
Suspension
Front Arm Type: short and long arm (SLA) · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Stabilizer Bar: diameter 35 mm · Front Suspension Classification: independent · Rear Shock Type: gas shock absorbers · Rear Spring Type: leaf springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-leaf
Telematics
Driver assistance app: roadside assistance · Satellite communications: Turn-by-Turn Navigation · Smart device app compatibility: myChevrolet with Connected Access · Smart device app function: maintenance status · Wifi: hotspot
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent
Air Conditioning
Single front air conditioning zones · Single rear air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: deactivation switch · Front side airbags · Third row side curtain airbags
Audio System
Antenna Type: mast · Auxiliary audio input: jack · AM/FM radio · Total Number of Speakers: 2
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.8 · Front brake width: 1.5 · Front brakes: ventilated disc · Rear brake diameter: 13.5 · Rear brake width: 1.6 · Rear brakes: ventilated disc
Comfort Features
Armrests: dual front · Floor Material: rubber · Steering wheel trim: urethane
Convenience Features
Assist handle: front · Cupholders: 3 · Front power outlet: 115V · Power outlet(s): 12V front · Reading lights: front · Steering wheel: tilt-adjustable · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: driver
Driver Seat
Manual adjustments: 4
Drivetrain
Axle ratio: 3.42
Engine
Alternator: 150 amps · Battery: maintenance-free · Oil cooler: auxiliary
Exterior Features
Door handle color: black · Exhaust tip color: stainless-steel · Front bumper color: black · Grille color: black · License plate bracket: front · Mirror color: black · Rear bumper color: black · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out · Window trim: black
Headrests
Front headrests: integrated · Number of front headrests: 2
Instrumentation
Fuel economy display: MPG · Warnings and reminders: maintenance reminder
Lights
Headlights: Auto on/off
Mirrors
Exterior mirrors: manual · Inside rearview mirror: manual day/night
Passenger Seat
Manual Adjustments: 4
Rear Seats
Type: bench
Roof
OEM roof height: undefined
Safety
Camera system: rearview · Child seat anchors: LATCH system · Rearview monitor: in mirror
Seatbelts
Fourth row seatbelts: 3-point · Front seatbelts: 3-point · Seatbelt pretensioners: front · Second row seatbelts: 3-point · Third row seatbelts: 3-point
Seats
Driver seat manual adjustments: reclining · Fourth row seat type: 50-50 split bench · Front seat type: bucket · Passenger seat manual adjustments: reclining · Upholstery: vinyl
Security
Power door locks: anti-lockout
Spare Tire
Mount Location: underbody
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 17.2 · Turns lock-to-lock: 3.0
Suspension
Front Arm Type: short and long arm (SLA) · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Stabilizer Bar: diameter 35 mm · Front Suspension Classification: independent · Rear Shock Type: gas shock absorbers · Rear Spring Type: leaf springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-leaf
Telematics
Driver assistance app: roadside assistance · Satellite communications: Turn-by-Turn Navigation · Smart device app compatibility: myChevrolet with Connected Access · Smart device app function: maintenance status · Wifi: hotspot
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent
Air Conditioning
Single front air conditioning zones · Single rear air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: deactivation switch · Front side airbags · Front side curtain airbags
Audio System
Antenna Type: mast · Auxiliary audio input: jack · AM/FM radio · Total Number of Speakers: 2
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.8 · Front brake width: 1.5 · Front brakes: ventilated disc · Rear brake diameter: 13.5 · Rear brake width: 1.6 · Rear brakes: ventilated disc
Comfort Features
Armrests: dual front · Floor Mat Material: vinyl/rubber · Floor Material: carpet · Floor Mats: front · Steering wheel trim: urethane
Convenience Features
Assist handle: front · Cupholders: 3 · Front power outlet: 115V · Multi-function remote: keyless entry with panic alarm · Power outlet(s): 12V front · Reading lights: front · Steering wheel: tilt-adjustable · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: illuminated passenger
Driver Seat
Manual adjustments: 4
Drivetrain
Axle ratio: 3.42
Engine
Alternator: 150 amps · Battery: maintenance-free · Oil cooler: auxiliary
Exterior Features
Door handle color: black · Exhaust tip color: stainless-steel · Front bumper color: chrome · Grille color: black with chrome accents · License plate bracket: front · Mirror color: black · Rear bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out · Window trim: black
Headrests
Front headrests: integrated · Number of front headrests: 2
Instrumentation
Fuel economy display: range · Warnings and reminders: maintenance reminder
Lights
Headlights: Auto on/off
Mirrors
Exterior mirrors: manual · Inside rearview mirror: manual day/night
Passenger Seat
Manual Adjustments: 4
Rear Seats
Type: bench
Roof
OEM roof height: undefined
Safety
Camera system: rearview · Child seat anchors: LATCH system · Pre-Collision Warning System: visual warning · Rearview monitor: in mirror
Seatbelts
Fourth row seatbelts: 3-point · Front seatbelts: 3-point · Seatbelt pretensioners: front · Second row seatbelts: 3-point · Third row seatbelts: 3-point
Seats
Driver seat manual adjustments: reclining · Fourth row seat type: 50-50 split bench · Front seat type: bucket · Passenger seat manual adjustments: reclining · Upholstery: cloth
Security
Power door locks: anti-lockout
Spare Tire
Mount Location: underbody
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 17.2 · Turns lock-to-lock: 3.0
Suspension
Front Arm Type: short and long arm (SLA) · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Stabilizer Bar: diameter 35 mm · Front Suspension Classification: independent · Rear Shock Type: gas shock absorbers · Rear Spring Type: leaf springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-leaf
Telematics
Driver assistance app: roadside assistance · Satellite communications: Turn-by-Turn Navigation · Smart device app compatibility: myChevrolet with Connected Access · Smart device app function: maintenance status · Wifi: hotspot
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent
Air Conditioning
Single front air conditioning zones · Single rear air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: deactivation switch · Front side airbags · Rear side curtain airbags
Audio System
Antenna Type: mast · Auxiliary audio input: jack · AM/FM radio · Total Number of Speakers: 2
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.8 · Front brake width: 1.5 · Front brakes: ventilated disc · Rear brake diameter: 13.5 · Rear brake width: 1.6 · Rear brakes: ventilated disc
Comfort Features
Armrests: dual front · Floor Mat Material: vinyl/rubber · Floor Material: carpet · Floor Mats: front · Steering wheel trim: urethane
Convenience Features
Assist handle: front · Cupholders: front · Front power outlet: 115V · Multi-function remote: keyless entry · Power outlet(s): 12V front · Reading lights: front · Steering wheel: tilt-adjustable · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: illuminated passenger
Driver Seat
Manual adjustments: 4
Drivetrain
Axle ratio: 3.42
Engine
Alternator: 150 amps · Battery: 600 CCA · Oil cooler: auxiliary
Exterior Features
Door handle color: black · Exhaust tip color: stainless-steel · Front bumper color: chrome · Grille color: black with chrome accents · License plate bracket: front · Mirror color: black · Rear bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out · Window trim: black
Headrests
Front headrests: integrated · Number of front headrests: 2
Instrumentation
Fuel economy display: range · Warnings and reminders: maintenance reminder
Lights
Headlights: Halogen
Mirrors
Exterior mirrors: manual folding · Inside rearview mirror: manual day/night
Passenger Seat
Manual Adjustments: 4
Rear Seats
Type: bench
Roof
OEM roof height: undefined
Safety
Camera system: rearview · Child seat anchors: LATCH system · Pre-Collision Warning System: audible warning · Rearview monitor: in mirror
Seatbelts
Fourth row seatbelts: 3-point · Front seatbelts: 3-point · Seatbelt pretensioners: front · Second row seatbelts: 3-point · Third row seatbelts: 3-point
Seats
Driver seat manual adjustments: reclining · Fourth row seat type: 50-50 split bench · Front seat type: bucket · Passenger seat manual adjustments: reclining · Upholstery: cloth
Security
Power door locks: anti-lockout
Spare Tire
Mount Location: underbody
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 17.2 · Turns lock-to-lock: 3.0
Suspension
Front Arm Type: short and long arm (SLA) · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Stabilizer Bar: diameter 35 mm · Front Suspension Classification: independent · Rear Shock Type: gas shock absorbers · Rear Spring Type: leaf springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-leaf
Telematics
Driver assistance app: roadside assistance · Satellite communications: Turn-by-Turn Navigation · Smart device app compatibility: myChevrolet with Connected Access · Smart device app function: maintenance status · Wifi: hotspot
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent