20 Most Recent 1996 GMC Suburban Questions & Answers

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1996 GMC... | Answered on Jan 29, 2018

The ECT should be located near the thermostat housing, screwed into the intake manifold. There may be a couple of sensors in the general location so compare the plug in portion to confirm which one it is.

Before you change the sensor, I would use a scan tool to see what information the ECT is actually relaying to the computer. I know I've seen ECTs tell the 'puter the engine was opposite of the symptoms you're describing. In other words the ECT was 'saying' it was -40°. Yea you read that right, 40° BELOW ZERO! Needless to say the engine would run super rich with that info.

So I would say it's POSSIBLE the ECT could be 'saying' the engine is warmer than it actually is which would result in poor cold starts.

It may also be the Manifold Air Temperature Sensor (MAT).

The 'puter isn't smart and is only going to adjust the perimeters for air/fuel, timing, etc. on the info it receives.

I don't want to simply say "go buy an ECT and/or MAT and put it in" because I'm not a believer in loading up the 'parts cannon' and firing away at a problem. Diagnose then replace.

Hope this helps.

1996 GMC... | Answered on Oct 05, 2017

Have you checked the temperature sending unit to the computer?

1996 GMC... | Answered on Sep 29, 2017

Disassembly of the column to get to the shift lever connection includes removing the air bag. Because there is a real hazard involved, this is not a job for the DIYer.

1996 GMC... | Answered on Aug 03, 2017

most all v8's have the same firing order which is 1,8,4,3,6,5,7,2. sparkplug gap seems fine. with the engine off, bend the sparkplug wires between your fingers, if small cracks appear then replace them. number one sparkplug is located at the front driver side of the engine, front to back on this side are cylinders 2,4,6, and 8 respectively. turn the engine to the compression stroke on number one, pull the cap, the rotor points where number one will be.

1996 GMC... | Answered on May 11, 2017

Check engine light on ? Lean codes , fuel trims ? Causes of lean condition trouble codes P0171 P0174 GM 5 3L

Do you know what a professional type scan tool is ? What fuel trims are . How to find a lean condition ? Understanding Short Term and Long Term Fuel Trim an SD Premium video

1996 GMC... | Answered on Mar 29, 2017

Probably the coolant is leaking from somewhere higher on the engine than the motor mount, and it is running to the lowest point before dripping off. It could be a leak from the head gasket area, or possibly from the front of the engine and the cooling fan is blowing it back. Another possibility is that one of the core plugs (or freeze plugs) is leaking and must be replaced. The worst possibility is that the engine block is cracked.
With the engine off, get under the vehicle with a strong light and check the area above the motor mount closely. If the coolant has been leaking for a while, you should see a nice clean path where it has been running down, possibly with whitish lines along the edge. Trace it back to where it comes from, and you will know what has to be repaired to stop it.

1996 GMC... | Answered on Dec 09, 2016

most likely a welsh plug leaking and running down on the mount
pressure test the cooling system and watch for where the coolant is coming from

1996 GMC... | Answered on Nov 16, 2016


1996 GMC... | Answered on Sep 12, 2016

That's the best way to do it. Look at the bottom of the relay, #30 and #87 are the ones you want to jump. Remove the gas line from the fuel filter. You probably should replace it anyway.

1996 GMC... | Answered on May 08, 2015

Get it scanned .AZ does it free

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_4c166ba81493f541

1996 GMC... | Answered on Mar 04, 2015

The reflectors and the housing usually have a small port or tube device to allow air to enter the housing to stop condensation. If there is a tiny tube or port that could be clogged, or the gasket to the lens is worn and leaking or cracked. You will have to dry out the condensation first before you reseal the headlight lens and housing. This means you will have to take it apart.

1996 GMC... | Answered on Feb 12, 2015

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