1999 GMC Envoy - Answered Questions & Fixed issues


bad earth on the bulb holder or the wiring, usually a good clean should sort it out.

1999 GMC Envoy | Answered on Jul 19, 2017 | 49 views


fuel pump.
spray starting fluid in air cleaner while cranking and if it fires it $-,--- bill to swap it or rockauto.com and your own wrenches

1999 GMC Envoy | Answered on Jun 03, 2017 | 140 views


There are small mounting screws on the edge of the plastic switch housing mounting it to the transmission. Remove the nut on the shaft in the center of the switch and pull off.

1999 GMC Envoy | Answered on Jul 23, 2016 | 44 views


Too much fuel going into engine which is then not burnt. This is due to one of the following, injectors inncorectly set or faulty, carboretor incorrecetly set or that the engine manigment chip is faulty. Timing may also be out, but this is less likely idf engine runs reasonable well otherwise. Hope this helps

1999 GMC Envoy | Answered on Dec 29, 2015 | 94 views


so long as ignition switch is fitted you only need fuel and a working engine, steering column is so car can turn.

1999 GMC Envoy | Answered on Dec 29, 2015 | 58 views


No spark. Crank sensor could be bad.

1999 GMC Envoy | Answered on Dec 26, 2015 | 71 views


I'm assuming you know what you're done. I would pull compression check on the side that you had to head work on and make sure thats up to spec depending on the vehicle if it's got overhead cam you might want to check the timing and also pray its a non interference engine. what I mean by interference is that there is ZERO tolerance between the piston and the valves when the piston is top dead center and if the timing is off the valve might be open at the wrong time and collide with the piston and then you have a bent valves.first thing I would do is a compression check and just cross your fingers and take it from there.

1999 GMC Envoy | Answered on Dec 26, 2015 | 285 views


I see no mention of spark or fuel both of which are needed to run

1999 GMC Envoy | Answered on Dec 09, 2015 | 119 views


First of all why do you have them taken apart there. If you didnt take it apart then this needs to be repaired first. Any leaks coming from exhaust before the o2 sensors will cause fuel dumping or lack of. This is causing low back compression also

1999 GMC Envoy | Answered on Oct 17, 2015 | 118 views


Bad manifold gasket or the manifold needs to be tightened down basically an exhaust leak

1999 GMC Envoy | Answered on Sep 30, 2015 | 88 views


Two things can cause this, The valve is not closing fully, valve stem binding on valve guide or weak return spring, or the valve or valve seat is worn and not making a good seal.

1999 GMC Envoy | Answered on Sep 21, 2015 | 109 views


Remove number, one spark plug , turn engine over till compression is felt, turn engine over till TDC marks on crank pulley and timing cover marks line up, fit distributor to motor with rotor pointing to number one distributor cap tower, start and set final timing with timing light.

1999 GMC Envoy | Answered on Sep 21, 2015 | 115 views


did you reconnect the cam position sensor plug

1999 GMC Envoy | Answered on Sep 15, 2015 | 48 views


Sounds like you have it right... clogged fuel injector. Please retrace all your plug wires and ensure they are in the proper place on the distributor... mixing up the firing order will certainly cause a misfire. A Bosch service center has the machine to clean the injectors and test the spray patterns. Bosh and DENSO make excellent replacements for most cars... change them all to prevent a recurrence and standardize the spray pattern. Check you PCV valve and Oxygen sensors while you are at it; although unrelated to your problem they will make your car run better if they function correctly.

1999 GMC Envoy | Answered on Mar 12, 2015 | 104 views


1. Drain oil
2. Remove oil pan.
3. Scrape off old gasket
4. Apply new gasket.
5. Re attach oil pan
6 . refill oil

1999 GMC Envoy | Answered on Dec 23, 2014 | 97 views


their is no such animal their is an oil filter thats external and the only filter thats in a pan is the transmission filter and thats an unbolt and pry loose and replace in the oil pan is the oil pick up

1999 GMC Envoy | Answered on Dec 23, 2014 | 33 views


check your cigarette lighter fuse. it powers the dlc

1999 GMC Envoy | Answered on Sep 14, 2014 | 105 views


This has happened to me!! check out this site your car is on the list for a security malfunction.. They sell a part ( lower than you will pay at the mechanics) it will bypass it

1999 GMC Envoy | Answered on Jul 28, 2014 | 39 views


Charge battery with charger to maintain then turn key to on position ,do not crank over . Leave in on position for ten minutes then turn to off and do the ten minute cycle to on position 2 more times then turn off then try to start

1999 GMC Envoy | Answered on Jul 28, 2014 | 67 views

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