won't shift out of first until 4,000 rpm and when it warms up it gets sluggish during acceleration.

won't shift out of first until 4,000 rpm and when it warms up it gets sluggish during acceleration. 1 Answer

Runs rough when it warms up and has no power 6 Answers

Truck starts up and run good but when it warms up it run s bad .loss if power and drinks lot of gas

My 1998 GMC sierra 4.3 speed matter and rpm hand stop working and will not shife out of first 1 Answer

Rpm not work and the speed hand don't work and will not shife out first

I have a 2005 gmc sierra 1500 4.3 v6. I get no kind of codes just going down the road and it die or start it up in the morning and it would just shut off. 2 Answers

I've changed the icm , the cps , plugs, wires, distributor cap and button. I've clean the throttle body. changed the serpentine belt and had the alternator tested. I've checked fuses. had the fuel pre...

My transmission slips when it shifts 1 Answer

I have a 1997 gmc truck and when it shifts it will slip any idea already replaced filter and fluid