20 Most Recent 1999 GMC Suburban - Page 4 Questions & Answers


solenoid wire to starter may be shorted at starter..

1999 GMC... | Answered on Mar 04, 2015


That's odd.The coolant flow is basically backwards from earlier chevys but still anything wrong should make it get hotter. I would have to try a winter front,cardboard or similar in front of the radiator and see if the temp comes up,indicating a faulty stat,seems unlikely but ...

1999 GMC... | Answered on Feb 15, 2015


Have someone operate lever while you are underneath ( on level ground, wheels chocked front and rear) to see if linkage operates normally and without slop.

1999 GMC... | Answered on Jan 13, 2015


Have you looked under rear of truck for broken wires? Anyone ever installed trailer wiring? Check at brake switch for juice.

1999 GMC... | Answered on Jan 13, 2015


Do turn signals work ok? Do you have current at the brake switch?

1999 GMC... | Answered on Jan 13, 2015


I had a similar problem with a Dodge Caravan - On the Dodge, it's called limp mode, designed to protect the engine and tranny. If you can get the OBD-2 engine codes and look them up online you may find that the problem is elsewhere in the drivetrain. Not really an answer, but a solid suggestion of where to go from here....

1999 GMC... | Answered on Dec 16, 2014


How was spark checked?

What about fuel pressure?

Was this a sudden thing, otherwise no
problems for two years?

More details are needed-the complete story,
long version

What has been tested so far & how was it done

What motor?

1999 GMC... | Answered on Dec 05, 2014


please provide more information.

1999 GMC... | Answered on Nov 29, 2014


must have a faulty door switch on one of the doors ,try the drivers door first as this gets the most use

1999 GMC... | Answered on Oct 23, 2014


How long is "a while" ? If it starts with a boost it can only be a couple of things. Dirty or defective battery cables , factory defective battery (yes, it happens) or the vehicle is drawing too much power when the ignition is shut off , often due to improper installation of after market stereo or something plugged into cigarette lighter. Also, does it crank over for a long time before it starts with a boost, or does it start quickly ? This is important as much cranking indicates other problems and means the vehicle probably needs a tune up.

1999 GMC... | Answered on Oct 04, 2014


it is probably in the gear shift try to lube the gromets on the frame where the pivot for the shift linkage is

1999 GMC... | Answered on Sep 19, 2014


when you replaced the intake gaskets you over tightened the bolts and cracked the plastic on the new gaskets or cracked them replacing the intake on the engine or the bolts needed to be replaced cause they were stretched or the wrong gaskets where sold to you and you have a vacuum leak these are the most common causes of the problem you are explaining the newer intake gaskets are very sensitive to over tightening you really have to be carefull and follow the tightening sequence and torque specs

1999 GMC... | Answered on Sep 01, 2014


check for codes, if none then check fuel pressure and volume with a gage. pressure should be in the area of 35lbs unless this is throttle body which is about 15/18lbs pressure, if this is a vortec motor the pressure is 55lbs. the volume should be about 1 liter in 15 seconds. the vortec injection systems have a problem with the spider fuel lines that go to each injector cracking/breaking causing no fuel supply and leaking into the intake manifold and not going into the cylinders.

1999 GMC... | Answered on Aug 23, 2014


firing order is 1342 . number one is stamped on the distributer cap.

1999 GMC... | Answered on Aug 11, 2014

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