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1993 GMC Sierra Questions & Answers
Have a 1993 gmc sierra. runs fine most of the time
When this truck dies,does it have spark,or fuel pressure?Check it for no spark,if it has no spark,replace the ignition module.These gm year models are bad to go out ,and the distributor pick up coil also.Replace the module first,if this does not help,replace the pick up coil.NOW ON A FUEL RELATED PROBLEMit could be fuel pump,fuel pump relay,or the pick up coil.The pick up coil pulses the injectors,and the spark.I hope this helps,if not let me know.
Good morning! Just to add to my previous
sounds like a vacuum leak from a mad gasket
as the engine warms up the gap increases allowing the noise
on acceleration the vacuum is very low so the noise is not heard
check for hoses that are cracked , loose or fallen off
Turn signals don't turn off when wheel is straight
The switch inside the steering column is broken. You can repair it if you are a little bit talented with tools .Buy your self a repair manual specific to your model and year. it will show you step by step Chilton or Haynes produce these for $25 any auto parts store. or better yet buy a factory repair manual for your truck but expect to pay $150 plus for it.There is a Factory "Service Manual" and a Unit Repair" manual the later is the one you want.
I have a '93 GMC
Once upon a time... half a century ago...
Carbureted engines had a hard rod between the throttle... and a Vacuum dashpot that FAIRLY EFFECTIVELY... signaled those
transmissions when to shift...
Likewise... when those same carburetors were out of whack...
Those old time (not so bad) engines were equally bogged down...
Probably not as efficiently...
All the new electronic bells & whistles are merely
relating INTERREALATIONS we already know...
So when you say you remove the foot from the "gas"
the VACUUM CLIMBS... the tranny shifts
AS IT SHOULD...
You know the trouble is the MANIFOLD PRESSURE or
the transmission control module (TCM)...
The choice which to try first is doubly EASY...
COST & DIFFICUTY of the MAP is easy & low.
If that guess is wrong you know to label the
MAINIFOLD AIR Sensor as a GOOD SPARE...
AND move on the TCM.
Principles remain the same...
Cheapest & easiest first...
Hope this helps!!!
The check gauge light comes on.
look at your gauges if you go low on fuel it will come on also check oil ,coolant level also check the battery or volt meter if low or high will set it off
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