20 Most Recent 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.

1993 GMC Sierra | Answered on Apr 29, 2018

1 Answer

I got breaks lights that dont work tail light work turn lights work backup lights work four wires going in to tail light system one is a ground break switch is new push the peddel power goes though it

probably a brake light switch at the top of the brake pedal arm feel up there till you find a white or black plastic switch. They are inexpensive at Am*zon or Rock Auto.

1993 GMC Sierra | Answered on Jan 24, 2018

1 Answer

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

1993 GMC Sierra | Answered on Sep 09, 2017

0 Answers

1993 GMC Sierra there is a popping noise coming from the rear end

1993 GMC Sierra | Posted on Aug 23, 2017 | Be the first to answer

2 Answers

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.

1993 GMC Sierra | Answered on Jul 22, 2017

1 Answer

On my extended cab, the front passenger seat will not slide all the way back to the lock position

There's probably something in the way. Get under and behind the seat with a flashlight and check the back end of the rails to see if something is there.

1993 GMC Sierra | Answered on Jul 09, 2017

1 Answer

What could be the cause of suddenly loosing overdrive, reverse, and hard shifting on 1993 700R4 transmission?

first off --run the fault codes
it could be a wiring problem, TCM , or VSS problem, oil change needed or transmission actuator problem

1993 GMC Sierra | Answered on Jun 20, 2017

1 Answer

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!!!

1993 GMC Sierra | Answered on May 24, 2017

1 Answer

I have a 1993 GMC Sierra 4x4, with a 350 motor, a 4L60E transmission with a 3/4 ton upgrade and shift kit as well. Now when i press on the accelerator it falls on its face and then picks back up. th

I would check the engine timing and do a check on the exhaust to be sure it is not partially blocked. As to the snapping when you shift I would check the universal joint to be sure it is ok and the rear end may have some play in it.

1993 GMC Sierra | Answered on Apr 29, 2017

0 Answers

1993 GMC Sierra | Answered on Dec 17, 2016

1 Answer

Belt diagram for 93 GMC 4.3 no air sierra

Google "DAYCO serpentine belt routing guides"

1993 GMC Sierra | Answered on Dec 09, 2016

1 Answer

I have a 1993 GMC sierra 1500 extended cab 4.3 v6 TBI and I'm hearing stories about this Accel Remote Mount Super Coil burning out Ignition Control Modules

I don't know about your particular application, but I do know that manufacturers are not using heavy enough wire for many things on a vehicle. So if the coils are bigger (higher output voltage) then they probably would draw more power and more load on control modules. I don't know any reason why stock would not be enough spark, these are a lot more powerful already than ignition systems were 40+ years ago. So in my opinion, no I wouldn't do it.

1993 GMC Sierra | Answered on Dec 03, 2016

0 Answers

Need help solving the mystery of the headlights not working on my 1993 gmc sierra the bubls are fine changed the switch and nothing the parking lights work but not the headlights

1993 GMC Sierra | Posted on Nov 07, 2016 | Be the first to answer

1 Answer

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

1993 GMC Sierra | Answered on Aug 30, 2015

1 Answer

I have a 93 gmc Sierra . I was gushing antifreeze yesyerday and noticed that there is a cap with a rubber plate around it.noticed that the piece on the inside broke off. Is this easy to fix?

no photos no joy
learn to post photos, we cant guess parts or exact location on the unstated engine.

1993 GMC Sierra | Answered on Jun 06, 2015

1 Answer

Replaced the egr value on a 1993 gmc Sierra still doing the same thing any suggestions

Check that the EGR vacuum solenoid is working. Remove the vacuum line to the EGR and there should be no vacuum in that line with the engine at idle.

1993 GMC Sierra | Answered on May 22, 2015

2 Answers

I have a 1993 gmc seirra. It runs fine everything. But when you have to stop my oil gauge drops and it acts like it wants to die. Even worse when the head lights are on. Can someone please help. I'm c

I'm having the same problem at the shop I work for. So far I've changed the computer chip in it, throttle position sensor, and it seems to be doing better. Haven't found the real exact problem yet so if it fixes it let me know please. Chip is about $80 from Autozone and tps about $40 or $50.

1993 GMC Sierra | Answered on Apr 17, 2015

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20 Most Recent 1993 GMC Sierra Questions & Answers

Have a 1993 gmc sierra. runs fine most of the time

I got breaks lights that dont work tail light work turn lights work backup lights work four wires going in to tail light system one is a ground break switch is new push the peddel power goes though it

Good morning! Just to add to my previous

1993 GMC Sierra there is a popping noise coming from the rear end

Turn signals don't turn off when wheel is straight

On my extended cab, the front passenger seat will not slide all the way back to the lock position

What could be the cause of suddenly loosing overdrive, reverse, and hard shifting on 1993 700R4 transmission?

I have a '93 GMC

I have a 1993 GMC Sierra 4x4, with a 350 motor, a 4L60E transmission with a 3/4 ton upgrade and shift kit as well. Now when i press on the accelerator it falls on its face and then picks back up. th

Torque specs for rear differential on 1993 gc sierra

1993gmc,Sierra diesal6.5serpinegine belt how do you pug it doem

93 seria 5.7 wont idle cold 1200 rpm when warm

Where is the door lock relay located on a 1993 gmc sierra sle

Belt diagram for 93 GMC 4.3 no air sierra

I have a 1993 GMC sierra 1500 extended cab 4.3 v6 TBI and I'm hearing stories about this Accel Remote Mount Super Coil burning out Ignition Control Modules

Need help solving the mystery of the headlights not working on my 1993 gmc sierra the bubls are fine changed the switch and nothing the parking lights work but not the headlights

The check gauge light comes on.

I have a 93 gmc Sierra . I was gushing antifreeze yesyerday and noticed that there is a cap with a rubber plate around it.noticed that the piece on the inside broke off. Is this easy to fix?

Replaced the egr value on a 1993 gmc Sierra still doing the same thing any suggestions

I have a 1993 gmc seirra. It runs fine everything. But when you have to stop my oil gauge drops and it acts like it wants to die. Even worse when the head lights are on. Can someone please help. I'm c

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