2000 3500tranny

BRIAN POWERS

MEMBER
2000 GMC C3500
V8
2WD
AUTOMATIC

Truck was in an accident, got hit in front of drivers front wheel well. Truck would not shift out of park. Took the battery out to charge and was able to shift the tranny thru the gears. Installed the battery agin after charging it and now can't shift it out of park again. This is all with stepping on the brake pedal. Ignition switch on.
The truck is a 2000, 3500sierra with a flat bed. Vin # of 1GDJC34JOYF494171. Thanks and hope you can help, Brian

1 Reply

WRENCHTECH

MECHANIC
20,761 POSTS

That would be called the shift interlock feature. It operates on the same circuit as the brake lights so the first thing you want to do is to make sure the brake lights are working when this problem is present. If the brake lights are working, that proves the circuit is good up to that point, then you'll have to get to the solenoid in the console/column. Disassemble as much as you have to to access the solenoid near the shifting mechanism. Us a 12v test light to test for power coming and going at the solenoid when the brake is applied. If power is arriving and switching and the solenoid is not triggering, the solenoid is bad and will have to be replaced.