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Open Help Requests for GM
Help Request Answers
1992 Cadillac Seville 4.9L ac controls
i turn on the ignition switch and the fuel data display and the ac control display comes on for 2 to 3 seconds then displays - - - the outside temp never does read anything. after 10 to 15 seconds the blower comes on high. the mode led is on the defrost knob. ...		 View
1996 Cadillac DeVille 4.6L MIL Lamp on
greetings to all,this caddy has a code for the cooloing fan circuit,a couple of checks that i made was using scan tool i can enegize all the cooling fan relays and they all work.i did find a relay that was wired in into the cooling circuit which made the fans ... Trouble codes: 1660 (cooling fan circuit).		 View
1976 Chevrolet Camaro 5.7L oil pressure
Hello, puzzling question on an older engine for you engine rebuilders. I have a student that rebuit this 350, checked out all clearances with him myself, put it in and have 40 psi at 2000rpm, almost zero at idle verified with two gauges at two ports on the eng...		 View
1993 Chevrolet Lumina 3.1L Stall, MIL Lamp on
This vehicle came in a mess. Customer complained of stalling intermittently. Had students check DTC's, found many rolling codes. Information on scanner was strange, tps stuck at 3.5v, -40f coolant temp, etc. Checked voltage at TPS to verify, found 5v in from r...		 View
1994 Chevrolet Corvette 5.7L calipers
vehicle came in with the complaint of brakes locking up after driving 5 to 10 miles. put vehicle on lift and all four wheels very hard to turn by hand. scan brake control module no codes found. broke lines lose at master cylinder to releave pressure all wheel ...		 View
1996 Chevrolet Tahoe 5.7L seat
SUV HAS A BAD VIBRAION STARTING AT 65. MILES AHOUR.AND DOES NOT Go away but does get worse. I have changed rear end tranny rear drive line front axles front wheel bearings tie rods ball joints had aligned. also has had two diffent sets of new tires and wheels....		 View
2000 Chevrolet Blazer 4.3L drive belt
Good afternoon everyone!I would like to request some advice on a relatively simple matter that is otherwise giving us a hard time.Here we have a 2000 S-10 Blazer that has a belt squeal that will go away for about a day but then return.The belt tensioner has be...		 View
2002 Chevrolet Silverado 6.6L starter
gm duramax tech's we need some help with this truck. came in for water pump and starter we replaced the starter with rebuilt from local rebuilder twice and still made noise we then looked at the flywheel which had some bad teeth but not the worst we have ever ...		 View
2002 Chevrolet Cavalier 2.2L Poor Idle Quality, Surge, Stall
This cavalier is quite the mistery. It runs very rich at all times. On initial startup cold it will push the O2 voltage above 900mv until it goes into closed loop at which time the fuel trim values go way negative and the O2 starts to respond. It has in the pa... Trouble codes: P0172 (Fuel system rich History Code).		 View
2002 Chevrolet Silverado 5.3L Battery drain
Hello! Experiencing a parasitic drain issue! When connecting meter with 10 amp scale across positive terminal when disconnected I'm noticing something strange. First off, the timeout process. After 5-10 minutes im showing a 32 milliamp drain from vehicle... so...		 View
2004 Chevrolet Avalanche 5.3L 4x4
thanks in advance for any help or suggestions. truck came to my shop originally with inoperable speedometer. ordered instrument cluster from dealer, replaced cluster, then off to dealer for a reflash. speedo worked fine. a short time later the customer called ...		 View
2005 Chevrolet Silverado 6.6L No power when cold
Hello, this guy brought this Duramax in and said when it is cold it sometimes doesn't have any power. Not all the time but randomly. It didn't act up in the shop. The code is for the Turbo Vane commanded position not the same as the actual position. I checked ... Trouble codes: P0045 (Turbocharger Vane Position Control Solenoid Control Circuit).		 View
2006 Chevrolet Cobalt 2.4L oil pan
hi there can anybody help me with the labor hours for replacing radiator,oil pan & a/c condenser on 2006 chevy cobalt with 2.4 engine		 View
1997 GMC Suburban 7.4L Drivetrain
I Have This 1997 GMC 2500 Suburban 4x4 With A Bang & Shudder In The Drivetrain. Originally Began As An Intermittent Problem When Driving If Hit A Bump Or Pothole, Now Occurs Just About Everytime Brakes Are Applied In Forward Only, Will Occur In Reverse Only Wh...		 View
2003 GMC serria denal 6.0L Misfire, MIL Lamp on
sorry i typed in the wrong box Trouble codes: p0120A (tp sensor problem), p2135A (tp sensor problem).		 View
2004 GMC Sierra 5.3L Stall, Misfire
Hey guys working on the in-law's truck. It will run very rich at idle and taking off. Then it will clear up and run great while crusing. The fuel trim for bank 2 goes to -30 and has very little power. Bank 1 fuel trim stays around +or- 5. Initially the bank 2 ...		 View
1997 Oldsmobile Eighty-Eight 3.8L No Start, Stall
This Olds has a peculiar issue. Stalls when in reverse. Sometimes hard to start. Cranks OK. What we found is, the fuel pressure drops to zero, when you put it in reverse. I've visibly checked for grounds from engine to body, engine to battery. No issues detect...		 View
1999 Oldsmobile Alero 3.4L cluster/no start
car came into our shop with the instrument cluster not working and secruty light would come on every now and then, checked all fuses everything was good. car sit from about a day or day in half in the serice bay, when we went to move the car out of the bay, th...		 View
1998 Pontiac Sunfire 2.4L air in hydraulic system
Help!!! I have a 98 sunfire that keeps coming back with air in the hydraulic clutch system. We replaced the slave (Fenco)and master cylinder(Napa)originally when we did the tranny job. Then when it came back a week later with air in the system, we replaced t...		 View
2000 Pontiac Bonneville 3.8L Poor Idle Quality
this car has an idle of 2000 rpm. It did it only when warmed up. we replace the lower intake and the plastic plenumn and now it does it all the time. we have tried everything we can possible think of . any ideas? we have installed a new Mass air flow sensor. I...		 View
2001 Pontiac Grand Am 2.4L Body Computer
One for you GM dealer tech's.Replaced a body computer in this '01 Pontiac Grand Am due to water intrusion.When I went to program the new bcm with my Tech 11 I got the message "Address error" and the bcm wouldn't finish programming.When I went to the data strea...		 View

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Roadmaster 5.7L starter
Thank-you to all who replied. The replies received were all great possibilities : ring gear burrs,starter brace, shims etc.The rest were; crank sensor, dist.cap, water leaks into dist.cap causing a violent kickback which I feel was the problem. When I told t...		 29
2002 Buick Rendezvous 3.4L Unknown
Thanks to everyone. Almost all said the diodes in the alternator were not working properly. Installed a new delco,should have done this first because it is a bear to r&r, and all is well. Once again you guys came through with the correct information. 		19
2002 Cadillac Escalade 6.0L power side view mirrors
calling this one fixed. had a buddy with a tech 2 hook up and reprogram the body module. customer is out 2 weeks and all seems ok. thanks for the replies, most hit on the programming. thanks for the help.		 4
2004 Chevrolet Silverado 5.3L No Power
We are convinced that this is an engine problem. The engine has very low vacuum at idle. The customer at this time has declined further repairs at this time due to the mileage on this truck. 		17
2004 GMC Yukon 6.0L Hesitation
FOUND PROBLEM TO BE RELATED TO TRACTION CONTROL. WHEN WE SHUT OFF TRACTION CONTROL PROBLEMWENT AWAY.FOUND PROBLEM IN RIGHT REAR SPEED SENSOR. CUSTDECLINED TO HAVE FIXED AND OPTED TO JUST KEEPTRACTION CONTROL OFF.		 9
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