20 Most Recent 1994 GMC Suburban Questions & Answers


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1994 GMC... | Answered on Mar 13, 2018


The only way to know for sure is to pull the blower motor and check the fan alignment and bearing - the fan may be hitting the case on each revolution at low speed. When you do, you will probably find a lot of debris in the cavity, especially up against the heater core (be VERY careful if there is some and you try to remove it).

1994 GMC... | Answered on Feb 03, 2018


This is torque converter shudder. Install Dr. Tranny's Shudder FIx Amazon com Lubegard 19610 Dr Tranny Instant Shudder Fixx 2 oz Automotive

1994 GMC... | Answered on Dec 22, 2017


Computer! The transmission 4l60E is electronically controlled .

1994 GMC... | Answered on Jul 14, 2017


it sounds like the iac (idle air control) needs to be replaced or at the least cleaned you can find you tube videos on this.

1994 GMC... | Answered on Apr 18, 2017


Diaphragm in the Master Cylinder torn or a leak in the pipe that provides the air suction to the master cylinder. Take in for service, both are quick jobs.

1994 GMC... | Answered on Nov 16, 2016


Neutral Safety Switch ? located at the bottom of the steering column. Mine is tricky, have to pull the shift lever while turning over to get it started. happened after i replaced ignition switch & Neutral Safety Switch

1994 GMC... | Answered on Sep 10, 2015


Usually on one end of the fuel rail.

1994 GMC... | Answered on May 24, 2015


blue smoke mean engine is burning oil bad cylinder piston rings

1994 GMC... | Answered on Apr 23, 2015


Sounds like a vehicle speed sensor, it governs shifting based on engine RPM vs Transmission RPM among other things. Located usually on the rear tailshaft or rear transfer case on the majority of 4L60E automatics.

1994 GMC... | Answered on Mar 29, 2015


You have two, one + and one negative. Hot one goes from battery to starter motor, so simply disconnect and replace. I find it wise to use a larger size cable than stock to insure strong current passage. Ground usually is right on top from battery to engine bracket. Use same larger gauge wire as for +. Be careful to route everything to stay away from hot exhaust parts and to not rub steering or other moving parts.

1994 GMC... | Answered on Jan 13, 2015


Check for fuel delivery when it fails. Most likely a bad coil or ignition module. Could also be crank sensor/cam sensor if your engine has these. Any spark to plugs?

1994 GMC... | Answered on Jan 13, 2015


The turn signals and the brake lights go through the hazard switch. Try cycling it a few times and see if that solves the problem. If the fuses are good and the 4way's don't work, I would suspect that switch.

1994 GMC... | Answered on Jul 25, 2014


Now can buy AC kits,did you try one,works for me .

1994 GMC... | Answered on Jul 12, 2014

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