1999 GMC Suburban - Answered Questions & Fixed issues
Why does ignition lock cylinder just turn back and forth?
all that must be repaired
is this car fitted out with IMMO and passive electronic keys?
got insurance, all them tell them car was vandilized
may INS CO> have special rules on that. unlike collision.
so call them if if yes, tow car to shop get it fixed on them.
we can not see what this car has there, lots of options!!
the GM car has a RPO list based off VIN full # (all options listed)
and will list IMMO PASSKEY, if there. and is the first thing to do on all cars. made 2decades, or go mad and broke fast.
first things first and fuses good too.
and scan the pCM for IMMO errors, etc.
for sure the key switch was wrecked by them or more.
more happens,
5/27/2023 2:13:40 PM •
1999 GMC...
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Answered
on May 27, 2023
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135 views
I have two 99 gmc suburbans 4x4 and 2wd could i put the 2wd body on the 4x4 frame?
Yes, there is no real difference between the body or frame of a 2whl and 4whl as long as they are the same length, IE standard cab, crew cap, long bed, short bed... If it is a HD 4x4 you might have an extra hole in the floor of the cab for the shifter lever, but the 2whl should have a block off plate for this. If not, you might need to fab up a patch.
1/7/2020 12:41:32 AM •
1999 GMC...
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Answered
on Jan 07, 2020
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108 views
Low beam lights won't work.
Don't know that much about 99 Surburbans but you may won't to see if you could just unplug it from the cluster or maybe see if thiers a fuse for your lights that you can take out
11/12/2018 4:55:22 PM •
1999 GMC...
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Answered
on Nov 12, 2018
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202 views
Drivers side door, not opening
VERY common issue.. the handle being replaced is ok.. but the actual metal rod that connects it to the latch needs bent a little to make it more responsive, what happens is over time this rod (which is bent slightly) will straighten, and the operator pulls harder on the handle which eventually brakes.. then replacing the handle will solve it for a while, until the trend repeats itself... VERY common, I have fixed hundreds in the shop so far...
9/29/2018 11:24:43 AM •
1999 GMC...
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Answered
on Sep 29, 2018
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1,532 views
1999 GMC Suburban K1500 4x4 randomly will not
randomly will not start 3 times?????? Won't start how ? When you turn the key to start ,nothing happens or the starter engages an spins the engine but won't start an run ?
1/17/2018 11:02:42 AM •
1999 GMC...
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Answered
on Jan 17, 2018
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181 views
I fixed the a/c leak(high and low side ports) in
Yes add oil,it is hard to say how much without knowing how much you lost. I would guess 4oz of pag oil. And yse vacuum and charge the same. Find out how much freon to add.
12/12/2017 11:08:23 PM •
1999 GMC...
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Answered
on Dec 12, 2017
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591 views
1999 suburban gage oil pressure is 0 when it warms
I looked at info for 1500--5.7L engine.6 psi @ 1000 rpms18 psi@2000 rpms24 psi @ 4000 rpmsSometimes, you can use analog gage in place of oil pressure sending unit and double check oil pressure that way. If oil pressure is actually low, if high mileage engine, I doubt replacing oil pump will help. I just wanted to add, check oil pressure engine warmed up.
10/15/2017 8:08:48 PM •
1999 GMC...
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Answered
on Oct 15, 2017
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502 views
Gm diesel 6 5
pump pressure is too low
should be around the 22,000 psi mark needed to crack the injectors
indicates that the there is a fuel supply problem to the pump or pressure regulation from the pump
7/22/2017 12:27:23 AM •
1999 GMC...
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Answered
on Jul 22, 2017
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107 views
Cruise control On my 1999 Suburban keeps cutting out
Have it checked for DTC'S - diagnostic trouble codes ? Does the battery goes dead with the vehicle sitting overnight ? Where do you hear the clicking noise coming from ? Under the insturment panel ?
Test the electrical circuits for those systems using voltage drop . Do you know how to test automotive electrical circuits using a DMM - digital multi meter and a wiring diagram so you know where to test at . Find out what this systems have in commond , a B+ voltage supply or do they share a common ground point ! Looking at a wiring diagram i see the cruise control and 4X4 transfer case shift control module share a common ground G- 103 & G-104 . Plus the
2 or 4 wheel drive light is controlled by the transfer case shift control module
G103 (Gas)
On the right front side of the engine, near the thermostat housing
Power and Grounding Component Views in Wiring Systems
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G104 (5.0L/5.7L)
Backside of the right cylinder head
It is more then likely a loose connection ( ground ) maybe ! But without testing this would be just a guess !
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
Electric Testing Techniques You Need to Know
How to Use Multimeter to Troubleshoot Common Problems
Free wiring diagrams here
http://www.bbbind.com/free_tsb.html Click wiring diagrams , not TSB'S Enter the vehicle info. year , make , model and engine size . Then under system click on the one's your having problems with . Start with testing B+ at the battery engine off ,then running ! 12.6 V engine off is a fully charged battery , 13.1 to 14 .1 + is good charging voltage . Watch the videos an test the circuits . Good luck ! You would like to know what the problem is for sure not guesses .
6/11/2017 5:44:56 PM •
1999 GMC...
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Answered
on Jun 11, 2017
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487 views
Spider injector replaced and no start
my thinking is when the engine backfired maybe one of the valves got bent and is now hitting a piston and keeping the engine from turning over or a rod may of gotten bent/broken. you could try taking all the spark plugs out than try rotating the engine backwards if it moves backwards try moving it forwards and see if it stops in the same spot if it dose than it is likely either a valve or the rod if you have something to look inside the engine throw the spark plug hole try to see if a valve is bent and try to see if all the pistons are all moving up and down the same amount. you may be able to tell if the pistons are moving by putting a rod throw the spark plug hole against the piston and trying to rotate the engine in either direction and see if the rod moves the same for all the pistons.
6/1/2017 7:57:51 AM •
1999 GMC...
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Answered
on Jun 01, 2017
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637 views
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