why do i have no heat
07 chevy 3500 express. new thermostat, blower is blowing cold air even with heat on. why do i have no heat

If they adopt any more children, Brangelina may want to consider the 2007 Chevrolet Express, a cargo/passenger van that's used mostly for fleet purposes, but can seat anywhere from eight to 15 people. A 12-person seating arrangement is standard. The closest rival to the Express is the Ford Econoline, but the Express has a bit more modern styling, and for 2007 it gets a new engine.
Once offered as the 1500 (half-ton), 2500 (three-quarter-ton), and 3500 (one-ton) models, the 2500 is axed this year, as are the V6 engines. There are three V8 engine choices. A new 5.3-liter, 295-hp V8 is standard, and a Flexible Fuel Vehicle version of this engine is offered. The straight cargo van features a 4.8-liter, 285-hp V8. The Express 3500 comes standard with a 6.0-liter, 300-hp V8. A 4-speed auto transmission is standard, with a heavy-duty version offered on the 3500.
The 2007 Express comes in an LS trim, which is sparsely outfitted with air conditioning and a radio, as it's aimed mostly at fleet use. An upgraded LT trim comes with power features, cruise control, and remote entry. Power front seats and a 6-CD player are options on the LT. An extended version is available only on the Express 3500, which is 20 inches longer than the 135-inch standard Express. This extended version seats 15 people. ABS brakes are standard across the line, but stability control is only available as an option on the 3500. An available option is the split-opening 60/40 driver's side door to ease passenger access. Rear doors open 180 degrees for easier cargo loading. Another nice feature is an all-wheel-drive option for the 2007 Express 1500, a feature that owners appreciate. The only real drawback is poor expected gas mileage.
07 chevy 3500 express. new thermostat, blower is blowing cold air even with heat on. why do i have no heat
is there a suspension or body lift kit for a 2007 chevy express 2500 2wd
i believe it is my heater core that is leaking not in the cabin but i see water dripping to the ground and a big rust stain on top of the frame in that area. i have heat and blower works but when i shut vehicle off the leak starts. what is the cause and how do i fix it
after posting yesterday i have exposed the ac condenser and the heater core. no signs of rust or water. the hoses from the heater core are not wet and the same with the water pump hoses radiator not leaking or the hoses. when i fill with fluid and bleed the air i get plenty of heat but as soon as i park it over night the fluid is gone. is there some type of water main seal on the engine? there is a big watery rust spot right where the front cross member meets the frame on the passengers side thats where the heater and condensor are but they seem fine. ANY SUGGESTIONS
i have a 2007 chevy express 3500 duramax 59,000 miles box truck, when i drive on the high way it wont go past 50 mph what may cause this problem and when you scan it a lot of codes come up...need advice bc this is my first diesl truck
Air Conditioning
Single front air conditioning zones · Rear air conditioning: with independent controls
Airbags
Dual front airbags
Audio System
Antenna Type: mast · 6 disc in-dash CD · AM/FM radio · Total Number of Speakers: 4
Brakes
ABS: 4-wheel · Front brake diameter: 12.0 · Front brake width: 1.14 · Front brakes: ventilated disc · Rear brake diameter: 13.0 · Rear brake width: 1.18 · Rear brakes: ventilated disc
Comfort Features
Floor Mat Material: vinyl/rubber · Floor Material: carpet · Floor Mats: front and rear · Steering wheel trim: leather
Convenience Features
Ashtray: with lighter · Center console: front console with storage · Cupholders: front · Dimming rearview mirror: auto-dimming · Multi-function remote: keyless entry · Power outlet(s): 12V front · Steering wheel: tilt-only · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: dual
Doors
Side door type: hinged swing-out
Driver Seat
Manual adjustments: 4 · Power adjustments: 6
Drivetrain
Axle ratio: 3.42 · Locking differential: rear
Engine
Alternator: 145 amps · Battery: heavy duty
Exterior Features
Bumper color: chrome · Front bumper color: chrome · Grille color: chrome · Paint: metallic · Rear bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side manual sliding
Header
Option Delete: Generic
Headrests
Front headrests: adjustable · Number of front headrests: 2
Instrumentation
Warnings and reminders: low fuel level
Locks
Power door locks: remote
Mirrors
Exterior mirrors: power
Passenger Seat
Manual Adjustments: 4 · Power adjustments: 6
Rear Seats
Rear heat: rear ventilation ducts with fan control · Type: bench
Roof
OEM roof height: undefined
Seatbelts
Rear center seatbelt: lap belt · Seatbelt pretensioners: front
Seats
Front seat type: bucket · 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 Suspension Classification: independent · Rear Axle Ratio: 3.73 · Rear Shock Type: gas shock absorbers · Rear Spring Type: leaf springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-leaf · Stabilizer bar(s): front
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Towing and Hauling
Trailer wiring: 7-pin
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent · Rear quarter windows: swing out
4th Row Seats
Bench seat
Air Conditioning
Single front air conditioning zones · Rear air conditioning: with independent controls
Airbags
Dual front airbags · Passenger airbag deactivation: deactivation switch
Audio System
Antenna Type: mast · Single disc in-Dash CD · AM/FM radio · Total Number of Speakers: 2
Brakes
ABS: 4-wheel · 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
Floor Mat Material: vinyl/rubber · Floor Material: carpet · Floor Mats: front and rear · Steering wheel trim: leather
Convenience Features
Ashtray: with lighter · Center console: front console with storage · Cupholders: front · Dimming rearview mirror: auto-dimming · Multi-function remote: keyless entry · Power outlet(s): 12V front · Steering wheel: tilt-only · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: dual
Doors
Side door type: hinged swing-out
Driver Seat
Manual adjustments: 4 · Power adjustments: 6
Drivetrain
Axle ratio: 3.73 · Locking differential: rear
Engine
Alternator: 145 amps · Battery: heavy duty · Oil cooler: auxiliary
Exterior Features
Bumper color: chrome · Front bumper color: chrome · Grille color: chrome · Paint: metallic · Rear bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side manual sliding
Header
Option Delete: Generic
Headrests
Front headrests: integrated · Number of front headrests: 2
Instrumentation
Warnings and reminders: low fuel level
Locks
Power door locks: remote
Mirrors
Exterior mirrors: heated
Passenger Seat
Manual Adjustments: 4 · Power adjustments: 6
Rear Seats
Rear heat: rear ventilation ducts with fan control · Type: bench
Roof
OEM roof height: undefined
Seatbelts
Rear center seatbelt: lap belt · Seatbelt pretensioners: front
Seats
Front seat type: bucket · Passenger Seating: 5 · 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 Suspension Classification: independent · Rear Axle Ratio: 4.10 · Rear Shock Type: gas shock absorbers · Rear Spring Type: leaf springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-leaf · Stabilizer bar(s): front
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: painted steel
Towing and Hauling
Trailer wiring: 7-pin
Wheels
Wheel covers: partial
Windows
Front wipers: variable intermittent · Rear quarter windows: swing out
4th Row Seats
Bench seat
Air Conditioning
Single front air conditioning zones · Rear air conditioning: with independent controls
Airbags
Dual front airbags · Passenger airbag deactivation: deactivation switch
Audio System
Antenna Type: mast · 6 disc in-dash CD · AM/FM radio · Total Number of Speakers: 2
Brakes
ABS: 4-wheel · 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
Floor Mat Material: vinyl/rubber · Floor Material: carpet · Floor Mats: front and rear · Steering wheel trim: leather
Convenience Features
Ashtray: with lighter · Center console: front console with storage · Cupholders: front · Dimming rearview mirror: auto-dimming · Multi-function remote: keyless entry · Power outlet(s): 12V front · Steering wheel: tilt-adjustable · Storage: door pockets · Vanity mirrors: dual
Doors
Side door type: hinged swing-out
Driver Seat
Manual adjustments: 4 · Power adjustments: 6
Drivetrain
Axle ratio: 3.73
Engine
Alternator: 145 amps · Battery: heavy duty · Oil cooler: auxiliary
Exterior Features
Bumper color: chrome · Front bumper color: chrome · Grille color: chrome · Paint: special factory paint · Rear bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side manual sliding
Header
Option Delete: Generic
Headrests
Front headrests: integrated · Number of front headrests: 2
Instrumentation
Warnings and reminders: low fuel level
Locks
Power door locks: remote
Mirrors
Exterior mirrors: heated
Passenger Seat
Manual Adjustments: 4 · Power adjustments: 6
Rear Seats
Rear heat: rear ventilation ducts with fan control · Type: bench
Roof
OEM roof height: undefined
Seatbelts
Rear center seatbelt: lap belt · Seatbelt pretensioners: front
Seats
Front seat type: bucket · Passenger Seating: 5 · 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 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 · Stabilizer bar(s): front
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: painted steel
Towing and Hauling
Trailer wiring: 7-pin
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent · Rear quarter windows: swing out
Air Conditioning
Single front air conditioning zones · Rear air conditioning: with independent controls
Airbags
Dual front airbags
Audio System
Antenna Type: mast · Single disc in-Dash CD · AM/FM radio · Total Number of Speakers: 2
Brakes
ABS: 4-wheel · Front brake diameter: 12.0 · Front brake width: 1.14 · Front brakes: ventilated disc · Rear brake diameter: 13.0 · Rear brake width: 1.18 · Rear brakes: ventilated disc
Comfort Features
Floor Mat Material: vinyl/rubber · Floor Material: carpet · Floor Mats: front and rear · Steering wheel trim: leather
Convenience Features
Ashtray: with lighter · Center console: front console with storage · Cupholders: front · Dimming rearview mirror: auto-dimming · Multi-function remote: keyless entry · Power outlet(s): 12V front · Steering wheel: tilt-only · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: dual
Doors
Side door type: hinged swing-out
Driver Seat
Manual adjustments: 4 · Power adjustments: 6
Drivetrain
4WD Type: full time · Axle ratio: 3.42 · Limited slip differential: center · Locking differential: rear
Engine
Alternator: 145 amps · Battery: heavy duty
Exterior Features
Bumper color: chrome · Front bumper color: chrome · Grille color: chrome · Paint: special factory paint · Rear bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out
Header
Option Delete: Generic
Headrests
Front headrests: adjustable · Number of front headrests: 2
Instrumentation
Warnings and reminders: low fuel level
Locks
Power door locks: remote
Mirrors
Exterior mirrors: power
Passenger Seat
Manual Adjustments: 4 · Power adjustments: 6
Rear Seats
Rear heat: rear ventilation ducts with fan control · Type: bench
Roof
OEM roof height: undefined
Seatbelts
Rear center seatbelt: lap belt · Seatbelt pretensioners: front
Seats
Front seat type: bucket · 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: torsion bars · Front Suspension Classification: independent · Rear Axle Ratio: 3.73 · Rear Shock Type: gas shock absorbers · Rear Spring Type: leaf springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-leaf · Stabilizer bar(s): front
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: painted steel
Towing and Hauling
Trailer wiring: 7-pin
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent · Rear quarter windows: swing out
4th Row Seats
Bench seat
Air Conditioning
Single front air conditioning zones · Single rear air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: deactivation switch
Audio System
Antenna Type: mast · 6 disc in-dash CD · AM/FM radio · Total Number of Speakers: 4
Brakes
ABS: 4-wheel · 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
Floor Mat Material: vinyl/rubber · Floor Material: carpet · Floor Mats: front and rear · Steering wheel trim: leather
Convenience Features
Ashtray: with lighter · Center console: front console with storage · Cupholders: front · Dimming rearview mirror: auto-dimming · Multi-function remote: keyless entry · Power outlet(s): 12V front · Reading lights: front · Steering wheel: tilt-adjustable · Storage: door pockets · Vanity mirrors: dual
Driver Seat
Manual adjustments: 4 · Power adjustments: 10
Drivetrain
Axle ratio: 3.73
Engine
Battery: heavy duty · Oil cooler: auxiliary
Exterior Features
Bumper color: chrome · Front bumper color: chrome · Grille color: chrome · Paint: special factory paint · Rear bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side manual sliding
Header
Option Delete: Generic
Headrests
Front headrests: integrated · Number of front headrests: 2
Instrumentation
Warnings and reminders: low fuel level
Locks
Power door locks: remote
Mirrors
Exterior mirrors: integrated turn signals
Passenger Seat
Manual Adjustments: 4 · Power adjustments: 6
Rear Seats
Type: bench · Upholstery: vinyl
Roof
OEM roof height: undefined
Seatbelts
Rear center seatbelt: lap belt · Seatbelt pretensioners: front
Seats
Front seat type: bucket · Passenger Seating: 15 · 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 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 · Stabilizer bar(s): front
Third Row Seat
Type: bench
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: painted steel
Towing and Hauling
Trailer wiring: 7-pin
Wheels
Wheel covers: partial
Windows
Front wipers: intermittent · Rear quarter windows: swing out