20 Most Recent 1994 GMC Suburban Questions & Answers

Question edited for clarity and spelling. Question moved to correct category from Miscellaneous. All in the link. One for air and one for coolant. https://www.google.com/search?q=1994+GMC+Suburban%3F+Temperature+sensors ..

At www.reliable-store.com get complete guide on whether to repair or not, service it, and how to repair etc, along with wiring diagrams, electrical diagrams, torque specs, error codes, everything.

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).

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

Computer! The transmission 4l60E is electronically controlled .

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.

hissing sound is from the brake booster, and you need to bleed the master cylinder first then the right rear then the left rear then the right front then the left front and then you should have a good pedal

94 gmc suburban 2500 fuse block Google Search Hmmm

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

Usually on one end of the fuel rail.

blue smoke mean engine is burning oil bad cylinder piston rings

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.

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.

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?

sounds like its locked up. you need to get it checked at a shop. I’m happy to assist further over the phone at https://www.6ya.com/expert/josh_8f8ad0a8f7e0e6d3

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.

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