20 Most Recent 1999 GMC Suburban - Page 6 Questions & Answers

if you recently installed your radio there is a wire designed to be direct connection to battery power , this wire is memory wire this is not connected to ignition barrel wiring . hope this helps

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

red for battery power
orange for ignition power
black for ground
those are basic wiring power,, the rest of wire are for speakers and equipment like rda

1999 GMC... | Answered on Mar 18, 2014

sounds like one of the balance weights has fallen off....

1999 GMC... | Answered on Dec 26, 2013

In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down the fuel injectors in your vehicle. This is probably what you are experiencing. This link explains it pretty well.

1999 GMC... | Answered on Dec 15, 2013

Recommend starting simple. If you suspect fuel pressure, it might be easier to start with replacing the fuel filter first, and checking fuel pressure at the filter while your there. It will give you a better chance to determine if the problem is at the pump or closer to the intake. If for some reason you have to replace the fuel pump...very common in this model truck because fuel gauge problems, the easiest way to access the pump is to unbolt the truck bed, block it up wood (Significantly easier than dropping the tank. I tilted mine to the passenger side), then you will have easy access to the pump. CAUTION!!! The connectors on the pump are brittle and break easily, especially in a vehicle this old. It's very difficult to get replacements, so take your time to prevent breaking fuel connections.

1999 GMC... | Answered on Dec 11, 2013

depending on where it is coming from will determine what your problem is if its coming from lines easy fix if its coming from a seal medium fix if it is coming from where the engine and transmission meet together hard fix and could be coming from radiator where the lines go into it from the transmission easy fix hope this helps

1999 GMC... | Answered on Dec 07, 2013

Shifter linkage needs adjustment.

1999 GMC... | Answered on Dec 04, 2013

Have to service these a lot it's the MAP sensor ( manifold absolute pressure sensor ) this should fixya.


1999 GMC... | Answered on Nov 25, 2013

do you mean interior light comes on , if so one of the door switches are not being depressed to shut of light this may include rear hatch door switch also , open one door at a time and depress switch with finger if light goes out try next door , also if light has been on you may have flat battery check charge first.

1999 GMC... | Answered on Nov 14, 2013

ignition switch on run ,,wire from run to coil,,, run 12 v to coil and start.. if it runs you narrowed down the problem...

1999 GMC... | Answered on Nov 10, 2013

take it back to the mechanic who rebuilt it-if he's worth his salt he should stand behind it -if not, time to find a new mechanic-cheers Denny

1999 GMC... | Answered on Nov 05, 2013

check you battery terminals are tightend to the max. also you might need a terminal cleaner, or you can use a wire brush and clean the terminals, to make better connectivity, most batterys only have a life span of max 5 years. also you might need new terminals as they tend to deteriorate over time. try a new battery, new terminals, and see what happens. if not you may need a starter or ignition switch. give me more detail, does it try to start? does it make a clicking noise? does anything turn on ie. lights, door alarm. does your horn work? can you smell anything when you do this? can you hear anything? can you see anything?

1999 GMC... | Answered on Oct 24, 2013

it on the driver side.open the door and it will be right there on the side of your dash console

1999 GMC... | Answered on Oct 24, 2013

turn the key to the on pos. and listen for a huming in the rear of the car as your fuel pump is in the tank. if you don't hear it then i would say that the pump is bad and need to be replace, but if you hear it it could be weak . try takeing off the air cleaner and spray some quick start down the intake and try starting it . if it start i would replace the pump . very easy to replace.

1999 GMC... | Answered on Oct 24, 2013

The easiest thing to do is get it pressure tested. That will show the leak right away. If not make sure that you check the area of the water pump, when they go bad, the bushing starts to wear and there is a WEEP hole that drips.

1999 GMC... | Answered on Oct 21, 2013

Not finding what you are looking for?
1999 GMC Suburban Logo

1,318 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

1995 GMC Suburban
1995 GMC Suburban

265 Questions

1994 GMC Suburban
1994 GMC Suburban

219 Questions

1993 GMC Suburban
1993 GMC Suburban

153 Questions

1992 GMC Suburban
1992 GMC Suburban

67 Questions

1990 GMC Suburban
1990 GMC Suburban

73 Questions

Top GMC Experts


Level 3 Expert

85223 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Suburban GMC

  • Suburban GMC

Most Popular Question

two 99 gmc suburbans 4x4 2wd could put

  • Cars & Trucks