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Prev Professional Automotive Repair Technical Discussions for January 14, 2011
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Open Help Requests for GM
Help Request Answers
2005 Buick LaCrosse CXS 3.6L MIL Lamp on VIN: 2G4WE53725
Good morning or afternoon!!! Here we go again, this car is crazy or it could be me. The problem is that it keeps setting a code for the rear o2 heater control. First it set the code po037 check the system , power and grounds are good so we changed the o2 ,tes... Trouble codes: P0037
2006 Buick Terraza CX 3.5L Cruise Control VIN: 5GADV23L26
Vehicle was brought in with cruise control inoperative. Body shop repaired afftected areas. After repair they had all systems working. We live in manitoba and it is winter, will cruise be disable in winter condition. Without t/c and abs activation? i can get c...
1991 Cadillac DeVille 4.9L Misfire, power loss VIN: 1G6CD53B2M
Hello, This Cadillac has a power loss under load and vehicle won't go over 40 MPH. When it was first brought into the shop we scope checked the ignition system and found that every other cylinder was generating a pattern that looked like a lean cylinder when ...
1994 Cadillac Fleetwood Brougham 5.7L Poor Idle Quality, Hesitation, Misfire VIN: 1G6DW52P1R
hey we got a 1994 caddy with the LT1 in it water pump was leaking but ran fine we did plugs and wires from gm and got a cap rotor distributor from summit racing because ther was play in the shaft and it is half the price of a gm one. we started up the car and ...
1994 Chevrolet Cavalier RS 2.2L No Start VIN: 1G1JC5440R
Customer towed vehicle in with a no start condition, we checked for spark, spark ok, check for fuel pressure, ok, check for injector pulse ok, check for codes no codes in system, check data display found base pulse with 96.0 clear flood mode, check coolant sen...
1994 Chevrolet S10 4.3L No Start VIN: 1GCCS19W9R
Ok, This S10 pick-up vortec has fuel pressure issues. Wont hold pressure, pump runs good. Removed pump and ran head pressure test, meaning no return line. Pump holds good pressure after bumping it up to 70psi. Cant find fuel pressure regulator on this system, ...
1996 Chevrolet S10 4.3L No MIL VIN: IGCCS19X8T
Customer had been driving the car in limp mode for over a year he didnít notice that it was not shifting. The check engine light had been on for a year and, after he had a heater core replaced 4 months ago the light was off. It failed the Arizona emission test...
1997 Chevrolet Express 1500 5.0L power steering pump VIN: 1GBFG15R6V
Damaged the electricial valve on the back off the steering pump. GM says not made anymore. Seem to remeber a fix posted here? Can not find it. Help!
2001 Chevrolet Express 1500 4.3L Lights VIN: 1GCFG15W41
Looking for anyone that has found a replacement resistor for the front running lights wiring harness short of purchasing a complete harness at over 400.00. This resistor is located near the left front headlight area at the radiator support.
2003 Chevrolet Impala 3.4L cooling system VIN: 2G1WF52EX2
Ok, I'm probably missing something simple here or just overthinking this one, but I have this Impala that came in because a few days ago the customer noticed the temperature guage getting close to pegging out, so he stopped the car and shut it off til it coole...
2003 Chevrolet Trailblazer LS 4.2L Encoder Motor VIN: 1GNDT13S43
Customer came in with 4wd service light on and code c0327. The switch indicator light is stuck on 4wd high. Cleared code and moved switch and could here the actuator working 3 or 4 times and then same problem. Found tsb#04-04-21-004 for this code-bad encoder s...
2008 Chevrolet Uplander 3.9L MIL Lamp on VIN: 1GBDV13W28
Hello my friends.I have this 08 Uplander thats making me pull my hair out.This one has an extended crank time and sometimes a no start and the codes P0172 and P1174 keep setting.After it is started first thing in the morning its good all day.The fuel trims are... Trouble codes: P0172, P1174
1999 GMC Jimmy SL 4.3L fuel, temp, alt light always on VIN: 1GKDT13W7X
customer complaint is gas gauge reading emty when full, the low fuel light is on, alternator light is on, temp gauge not workig, all happend at the same time. was working fine befor hand, with no symtoms prior to this happening. ran threw the flow chat and cam...
2000 GMC Jimmy SLE 4.3L Transfer Case VIN: 1GKDT13W9Y
Ok so im stuck and need some guidance. I have this jimmy w/ the service 4x4 light on (2) codes stored:c0308 t-case a/b shorted to ground and c0323 t-case lock. From previous experiences i know these auto 4x4 systems are notorious for bad modules however i can ...
2007 GMC Sierra 1500 Denali 6.2L battery VIN: 2GTEK63887
This Denali still has 1.4 amp draw on battery . If i remove all interior and under hood fuses one at a time, does'nt change more than about .1 amp . But if i remove entire fuse, relay box from its plug in holder all draw is gone. Could there be a drain inside ...
2007 GMC Sierra 1500 WT 5.3L battery VIN: 1GTEK19J57
Well, this was the second job this week;one on Monday and one on Friday! Cutomer jumpstarted truck Thursday morning,battery completely dead as if drained overnite. The battery did charge up during the days driving. I had vehicle in shop overnite;checked for a...
1991 Pontiac Grand Prix GT 3.4L No Start VIN: 1G2WP11XOM
Car was idling in parking lot and quit running. I have spark and fuel pressure 43 psi. I also have injector pulse and 160 psi compression. Have hooked up injector cleaner and replaced with gas. Will still not start. Crank sensor and module with coils was repla...
2000 Pontiac Firebird Trans Am 5.7L Headlight lift motor and wipers VIN: 2G2FV22G6Y
Recently vehicle came in with intermittent wipers malfunction, could be set on intermittent and would just swipe like on low speed with no intermittent or would not turn on or would not shut off, or at times work a-o-k, felt it was the module that I was told i...
2003 Pontiac Bonneville SE 3.8L Hesitation, Surge VIN: 1G2HX52K43
A Simple 3.8 has me buffalo'd. This car will give a hesitation (less sharp than an ignition miss) under very light throttle in drive or overdrive with torque converter clutch engaged. Engine must be fully warmed up. RPM never changes and all data on the scanne...
2004 Pontiac Grand Am SE 2.2L Starting VIN: 1G2NF52E94
Hello All. I have a 2004 Grand Am I could use some help with.Car was towed in for no start.Engine cranks ok fuel pressure is good and I have spark.Engine will run ok on carb cleaner.I have 12v rev to injectors and can fire them all individually through the sca...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick Regal Custom 3.1L MIL Lamp on VIN: 2G4WB54T9P
thanks guys for all of your inputs, sorry it took me so long to get back and update the info(been down with the flu). I have sent the vehicle over to another shop for the repairs. thanks again for all of you guys input. God bless you. Trouble codes: 13 (15 -), 15 (21 -), 21 (22 -), 22 (24 -), 24 (32 -), 32.
2007 Cadillac CTS 2.8L clutch bleeding VIN: 1G6DM57TX7
Thanks to all who replied with ideas. The root of the problem was the new slave cly. This system comes with quick disconnect no leak when disconnected fittings between the master and slave. The master cly comes complete with hoses and resavor and is preblead. ...
1995 Chevrolet G20 Sportvan 5.7L 2-3 shift VIN: 1GNGG35K7S
Thanks to all who helped, especially Brian for calling me. It is easier to describe symptoms verbally then texting, anyway I use a genysis scan tool and it would not detect any codes. Brian suggested I try to borrow a tech2 or snap on scan tool, which I did an...
2003 Chevrolet Suburban 2500 LS 6.0L Control Head VIN: 3GNGK26U63
Thanks for the replies most were correct we had to replace the control head still not sure what went wrong had battery power supply and everything need to reprogram but ended up getting used part and it programed no problems
2006 Chevrolet Express 3500 6.0L Hesitation VIN: 1GBHG39U26
thank you all for the quick replies. A few of you hit it right on the head with the wheel speed sensors. this morning I was able to drive it again and could see that the front sensors were not reading until 5 mph due to rust build up under them. threw me off...
2006 Chevrolet Trailblazer LT 4.2L Cuts out, Stall VIN: 1GNDS13S66
The information given was of good use, The item that we replaced was the ignition switch-- So far we think the problem is repaired Thanks to all for the good information
2007 Chevrolet Silverado 1500 LS 4.8L Theft System VIN: 1GCEC14X57
2008 Chevrolet Avalanche LS 5.3L Differential VIN: 3GNFK12388
Well guys, its fixed.. It was a pain cause the VIN says it is an AWD, but the selectable buttons prove different.. There is a foot of snow so no I'm not driving on dry pavement... The thing is I was led to use 80W90 Conventional by Mitchell, even though I q...
2009 GMC Sierra 1500 WT 4.8L Cuts out VIN: 1GTEC14C69
One reply referenced a TSB. One stated the module location. The other one said that these modules fill with water. I removed it and could hear the sloshing inside. Opened it up and corrosion city. My local dealer actually stocked the part. Only issue was that ... Trouble codes: P025A.
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