Shifting problems. 2000 GMC Sierra 1500 4.8L
5

Asked by Timpe73 Apr 26, 2020 at 07:58 PM about the 2000 GMC Sierra 1500 SL 4WD Standard Cab LB

Question type: Maintenance & Repair

My truck is having problems shifting. It seems
like it’s stuck in limp mode. I have already
changed the shift solenoids and replaced the
transmission filter, changed the ignition
switch, checked all of my fuses and wires and
grounds. My speedometer and gages all work
fine.

2 Answers
10

Luckyguess answered 4 years ago

Check the ground on the back of the block between firewall. TPS maybe. Brake switch. Speed sensor. Your problem is one of these I’ll bet.

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