20 Most Recent 2002 GMC Sierra 2500HD Questions & Answers


There is a resistor attached to the blower box. Replace the blower resistor and this should solve your problem

2002 GMC Sierra... | Answered on Jun 26, 2019


Sounds like your a/c clutch is locking up and wearing your belt in half.

2002 GMC Sierra... | Answered on Jan 17, 2018


Ouch. It sounds like truck was overloaded with too much weight by previous owner.
Time to go to scrap yard and pick up a used rear axle assembly. Take it apart and check it for cracks before you reinstall it.

2002 GMC Sierra... | Answered on Sep 22, 2017


Did you bleed the air out?

2002 GMC Sierra... | Answered on Aug 03, 2017


Starter relay , ignition switch , park neutral psition switch if automatic trans , clutch start switch if manual trans. , battery cables ,connections . If you don't know how to do automotive electrical circuit testing , your best bet , take it to a qualified repair . How to voltage drop test starter motor circuit
Starter Voltage Drop
Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter the vehicle info. year ,make , model and engine size . Under system click on engine ,then under subsystem click on starting . Click the search button ,then the blue link . Look an see what all is involved in the starting system . Use a volt meter an test to see where B+ voltage is an where it isn't while someone turns the key to start . You can rule out the load (starter ) side by jumping pins 30 & 87 where the relay plugs into . Watch this video on relays .

VEHICLE RELAYS Operation Diagnosis


2002 GMC Sierra... | Answered on Jul 25, 2017


You have to hit the lock button and then hold the start button.

2002 GMC Sierra... | Answered on Jan 12, 2016


release the tension on the idler pulley. Many YouTube videos.
Most cars is a easy and inexpensive R&R

2002 GMC Sierra... | Answered on Jan 25, 2015


if it's in the transmission other than ck'ing to see if you have proper level and quality fluid level in trans theres not much a homeowner can do your gonna need to find a good trans shop
1st try getting a fluid flush and fill this is a lower cost fix that sometimes works and you don't need to remove trans to do it

2002 GMC Sierra... | Answered on Sep 16, 2014


That clunking noise you get it whilst you are braking or just as you are coming. If it is whilst on breaking,check your rear brakes. if is whilst coming check for any suspension shocks,bushes.

2002 GMC Sierra... | Answered on Aug 30, 2014


THERE HAVE BEEN ALOT OF PLOBLEMS WITH THE SHIFTER HANDLE/SWITCH. THE BEST WAY TO VERIFY CONCERN IS USE A DIAG. SCANNER & VIEW TRANSMISSION DATA DISPLAY WHILE ENGINE RUNNING. THE SWITCH IN THE SHIFTER IS FAULTY. IF YOU SEE NO INPUT CHANGE WHILE DEPRESSING SWITCH THIS IS YOUR CONCERN.

2002 GMC Sierra... | Answered on Jul 04, 2014


Bad diode on printed circuit board common problem

2002 GMC Sierra... | Answered on Jun 06, 2014


possible crank sensor and or crank fuse and or dead battery in remote or in car.

2002 GMC Sierra... | Answered on May 24, 2014


sounds like starter motor/solenoid problem, try hitting the starter motor with a hammer , a couple of sharp hits may loosen off the bendix if this is the problem, if starts replace the starter motor

2002 GMC Sierra... | Answered on May 05, 2014


Check fuses I believe there is a main starter relay under the hood in the fuse box. Will it crank in neutral.

2002 GMC Sierra... | Answered on Apr 13, 2014


Have you checked the Solenoid? That would be why the starter would keep engaging, but not start. You might also want to check the Voltage Regulator, and the sensors. Here is a page of images that might help you with identification.


2002 GMC Sierra 2500HD solenoid Google Search

Thank you for contacting Fixya.
Does this help? Let us know.

Ponder/Meditate/Pray for Peace.

Mary Oliveau { hugs }

2002 GMC Sierra... | Answered on Feb 25, 2014

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