This Buick quits while driving.
This 03 LeSabre will just shut off while driving down the road. The dash will shut down and back on like someone cycled the key.

Buicks have normally been thought of as a grandparent's car, but that doesn't mean it doesn't occasionally like to let its blue hair down and party. The 2003 Buick LeSabre celebrates 10 years of being the top-selling full-size car in America and the 100th anniversary of Buick Motors by releasing 10,000 Celebration Editions of the LeSabre Limited. Packed with all of the Limited features, the Celebration adds two-tone leather and black cherry wood trim on the inside, and a blacked-out grille, body-colored rocker panels, and 16-inch chrome-plated aluminum wheels on the outside. Of course, there's also appropriate badging. The Celebration Edition also features more standard equipment, such as the heads-up display and the StabiliTrak stability system, both of which are only optional on the Limited.
There are few changes to the traditional Custom and Limited versions of the 2003 LeSabre. Satellite radio was made available this year for the Limited, and for some reason the standard side airbags on the Custom were turned back into an option. A 3.8-liter, 205-hp V6 engine powers the 2003 LeSabre, matched to a 4-speed automatic. 15-inch wheels are standard, but 16-inch ones can be added through the Gran Touring Package, which also features a stiffer suspension and a rear stabilizer bar. The full-size LeSabre seats six in two rows of bench seats, though bucket seats can be substituted in the front. All models come with power driver's seat, full power features, cruise control, ABS brakes, and remote entry. Leather seats with memory settings, traction control, OnStar, auto-dimming rearview mirror, and dual-zone climate control are added to the Limited.
The 2003 LeSabre gets five-star ratings in crash tests, thanks to its dual front airbags, stiffer seatbacks, and headrest restraints that move forward to cushion the head. Older drivers and those with young families like the combination of safety, smooth ride, and interior room and comfort. Gas mileage is respectable for a full-size, and all the standard features lead some drivers to call it an "affordable Cadillac." Others wish it had a V8 optional engine. The backseat is smaller than you'd think, there is wind noise at high speeds, and the 2003 LeSabre seat materials seemed to wear out easily and not be as comfortable as in previous years.
This 03 LeSabre will just shut off while driving down the road. The dash will shut down and back on like someone cycled the key.
I have 2003 Buick LeSabre and I want to test the back lights of controls out of the dash. Was wanting to know which leads are positive and negative to power it out of the dash?
At around 55-60 MPH is when she starts shaking. The steering wheel and the car itself will shake/intensely vibrate. Also when making turns, the whole thing will shudder half the time. The half it's fine. Alignment needed maybe? Bought it used so I don't much about service history. Engine and transmission were rebuilt at some point.
Today I put the back window down with the driver's switch and now it won't go up with either one. Where's the problem now.
Airbags
Dual front airbags · Front side airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Convenience Features
Multi-function remote: keyless entry · Steering wheel: tilt-adjustable · Steering wheel mounted controls: audio
Lights
Exterior entry lights: security approach lamps · Headlights: Auto on/off
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Rear Seats
Type: bench
Seats
Front seat type: bucket · Heated: front seats · Upholstery: leather
Suspension
Air Suspension: rear · Leveling: self leveling suspension
Tires and Rims
Wheels: steel
Windows
Front wipers: intermittent
Air Conditioning
Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Front side airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Steering wheel trim: leather
Convenience Features
Dimming rearview mirror: auto-dimming · Multi-function remote: trunk release · Steering wheel: tilt-adjustable · Steering wheel mounted controls: audio
Exterior Features
Paint: special factory paint
Lights
Exterior entry lights: security approach lamps · Headlights: Auto on/off
Mirrors
Exterior mirrors: heated
Rear Seats
Type: bench
Roof
Moonroof: power
Seats
Front seat type: split-bench · Upholstery: leather
Suspension
Air Suspension: rear · Leveling: self leveling suspension
Telematics
Satellite communications: OnStar
Tires and Rims
Wheel type: aluminum alloy · Wheels: chrome
Windows
Front wipers: intermittent