1992 GMC Sierra

[dpb32]

My 1992 Gmc Sierra has this strange stalling issue.

The truck starts and runs fine with now problems.

But for some reason when say I'm comming to a stop at at traffic light the truck shuts off within the 0-5km/hr range.

 

A lot of times I can Put the truck in Park to prevent it from stalling but you have to time it perfectly and doesnt always work.

 

So once it stalls I can start it and drive with no problems.

 

I took the truck to Our Local GMC Dealer,

 

And after 10 days and $1500 dollars the dealer said it was a Faulty module.

 

They replaced the module and now its doing the same thing after 6 months .

 

This is leading me to belive it is not a module problem

[MikeNH]

Do motors from that era have an idle air control valve? If so, that'd be my first guess.

[Duelin]

Could be the torque converter staying locked up. Check it out.

[gmtech4]

21 yr old truck and the internet ,,,,,,,ahhhhhh rite .........

 

 

id be taking it back to the place that hosed ya

[Jsdirt]

Yeah, I hear ya Rob. I guess this one is better than diagnosing a "squeak" online though!

 

 

Just cleaned an IAC due to having the same problem ... but it was on a 27 year old Mercury Grand Marquis. Completely different design though - sequential FI, so only air going though the butterfly. '92 GM should be throttle body - basically a carb with 2 injectors on top squirting on the butterfly, so no IAC.

 

The ol' module aye? Did they tell you WHAT module? Sounds like a ripoff in progress ....

[MikeNH]

That's right... I forgot GM stuck with TBI for a bit longer than Ford did.

[Duelin]

TBI's had IACs. After cleaning them you had to drive for a while to get the idle back. Just make sure you don't move the pentle.