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Prev Professional Automotive Repair Technical Discussions for March 10, 2008
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Open Help Requests for GM
Help Request Answers
1992 Cadillac Seville 4.9L ac controls VIN: 1G6KS53B7N
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. ...
1996 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD52Y7T
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)
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...
1993 Chevrolet Lumina 3.1L Stall, MIL Lamp on VIN: 2G1WL54T2P
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...
1994 Chevrolet Corvette 5.7L calipers VIN: 1G1YY22P5R
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 ...
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....
2000 Chevrolet Blazer LS 4.3L drive belt VIN: 1GNDT13W9Y
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...
2002 Chevrolet Silverado 2500 HD 6.6L starter VIN: 1GCHK23162
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 ...
2002 Chevrolet Cavalier LS Sport 2.2L Poor Idle Quality, Surge, Stall VIN: 1G1JH12F52
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)
2002 Chevrolet Silverado 1500 5.3L Battery drain VIN: 1GNFK162J2
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...
2004 Chevrolet Avalanche 1500 Z66 5.3L 4x4 VIN: 3GNEK12T14
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 ...
2005 Chevrolet Silverado 2500 HD 6.6L No power when cold VIN: 1GCHK29285
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)
2006 Chevrolet Cobalt SS 2.4L oil pan VIN: 1G1AM15B46
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
1997 GMC K2500 Suburban 7.4L Drivetrain VIN: 3GKGK26J2T
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...
2003 GMC Sierra Denali 6.0L Misfire, MIL Lamp on VIN: 2GTFK69U53
sorry i typed in the wrong box Trouble codes: P120, P135
2004 GMC Sierra 1500 SLE 5.3L Stall, Misfire VIN: 2GTEK19T34
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 ...
1997 Oldsmobile 88 Royale 3.8L No Start, Stall VIN: 1G3HN52K7V
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...
1999 Oldsmobile Alero GL 3.4L cluster/no start VIN: 1G3NL5273X
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...
1998 Pontiac Sunfire GT 2.4L air in hydraulic system VIN: 1G2JD12T6W
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...
2000 Pontiac Bonneville SE 3.8L Poor Idle Quality VIN: 1G2HX54K5Y
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...
2001 Pontiac Grand Am SE 2.4L Body Computer VIN: 1G2NF52T31
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...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Roadmaster Estate Wagon Collector's Edition 5.7L starter VIN: 1G4BR82P8T
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...
2002 Buick Rendezvous CX 3.4L Unknown VIN: 3G5DA03E82
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.
2002 Cadillac Escalade 6.0L power side view mirrors VIN: 1G1EK63N42
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.
2004 Chevrolet Silverado 1500 5.3L No Power VIN: 1GCEK19T34
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.
2004 GMC Yukon Denali XL 6.0L Hesitation VIN: 1GKFK66U44
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