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Prev Professional Automotive Repair Technical Discussions for October 22, 2010
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Limited 3.8L Stall VIN: 1G4HP54K9Y
This car has had this problem for the last year and a half and for the third owner. Very intermittant stall when warmed up and driving. It happens about once every 2 to 3 months. Only recently were we able to determine that it loses spark, because it ususally ...
2005 Buick LeSabre Custom 3.8L Cuts out, Stall VIN: 1G4HP52K55
Hello evryone, I have a very interesting problem with this vehicle. Customer complaint is that the vehicle will randomly stall at cruise speed or more commonly at low speeds when approaching a stop. There are no codes in the PCM,that we can find. This vehicle ...
1996 Cadillac Seville STS 4.6L MIL Lamp on VIN: 1G6KY5294T
this car came to the shop with a problem on the dash, the radio and the a/c no working, the lights on the dash are flashing, (only the transmission position indicator) and the temperature gauge and the fuel gauge don't work either when the problem happens, bec... Trouble codes: P1626, P1602, P1604, P1610, P1611
1995 Chevrolet C2500 7.4L Poor Idle Quality, Cuts out, Stall VIN: 1GCGK29N1S
Hello fellow techs and automotive gurus. I have an impossible one that is throwing us all for a loop. This 1995 Chevy has a 7.4L. This darn thing came in barely running as it would not idle and no power at all. I found that the IAC motor was not working until ...
1997 Chevrolet K3500 6.5L No Start VIN: 1GCHK39F8V
happy friday everyone, new customer came in with a no start. i checked fuel at the filter, it seamed to have alot of air. the gauge said full. looked underneath and the tank [steel] is almost collapsed. added fuel and it runs. the customer stated that it happe...
2000 Chevrolet Express 3500 6.5L Extended cranks VIN: 1GCHG35F8Y
After June's roadside breakdown a new remote mount PMD repaired this vehicle. Throughout the course of this past summer new items were added as mentioned. Since August 2010 twice a month this vehicle cranks for a long time. In Sept. put two new batteries in (u...
2001 Chevrolet Prizm 1.8L Hesitation VIN: 1Y1SK52871
this vehicle has me baffled. when the vehicle goes into closed loop operation the computer starts to pull fuel. it will pull fuel until the car is runnng so lean that it gives you a huge hesitation tip in under acceleration. if i disconnect the front o'2 senso...
2004 Chevrolet Aveo 1.6L No Start VIN: KL1TJ62664
Hello me it's me again. Kidding, anyway hello to all and thanks in advance. This weapon was towed in as a no start. So far I have check and found no codes. Data is very poor for how many parameters there are. Must be daewoo electronics. I have spark but no inj...
2004 Chevrolet Corvette 5.7L abs VIN: 1G1YY22G24
Hey Techs! Happy Friday! We have a customer with a 2004 Corvette, and he commutes about an hour to work each way everyday, he claims only on his way home, the Active Handling System Message in the DIC will come on. We scanned computer, had no codes stored. Cus...
2004 Chevrolet Silverado 2500 6.0L transfer VIN: 1GCGK23U54
Truck came in for lights on selector switch changing to auto 4wd. The control module was replaced and programed but customer return with pretty much the same complaint. I found when cycling the ignition not all lights on selector switch would like as supposed ...
2006 Chevrolet Cobalt LS 2.2L Electronic VIN: 1G1AK55F26
I have this Cobalt that is driving me crazy. Thanks in advance to all who look. Check engine light on, P0700, went to transmission codes and have P0961 Line pressure control solenoid performance and P0976 2-3 shift solenoid low voltage. Transmission defaults t...
1998 GMC Yukon SLT 5.7L Tail lights, directionals VIN: 1GKEK13R6X
car came in with odd electrical issue. all light work as designed with out the head lights on. Once the head lights are switched on, the tail/brake lights & plate lights start to flash in a "wig-wag" style pattern. only with the head lights switched on. To me,...
2003 GMC Yukon Denali 6.0L Misfire VIN: 1GKEK63U03
came in with poor power complaint test and replaced bank 1 rear o2 sensor , Vehicle ran perfect for 2 days. Customer complained of no power towed in to shop, scaned computer and miss fire was on pass bank 2468 cylinders Good spark , injector pulse with , good ... Trouble codes: P0300
2006 GMC Sierra 2500 HD SLE 6.6L Glow Plugs VIN: 1GTHK23D06
Truck came in with 1 glow plug code p0674,found bad glow plug,replaced plug,sold customer all 8,next plug tried to remove,plug broke in head,before i try to remove others,i wanted to know if there was any tips/tricks to remove broken plugs or remove without br...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Cadillac Catera 3.0L TCM Internal Error VIN: W06VR52RV4
Thanks Robert,Rob and Jerry.The fow chart I used directed me to test for output voltage from the PCM and condemn the PCM if there was none. Rob cleared the air on that with the info he supplied. I found the 2-3 solenoid open. I sent it back to the trans shop. ...
2004 Cadillac CTS 3.6L Ebcm VIN: 1G6DM577X4
Well after isolating all of the other modules individually on the class 2 data line to make sure I didnt have one of them pulling the communication line down to no avail. I plugged the old EBCM back in without hooking it to the BPMV. I noticed at that point I ...
1986 Chevrolet Corvette 5.7L Poor Idle Quality, Hesitation, Cuts out, MIL Lamp on VIN: 1G1YY0788G
Replaced maf with ac delco and car is running good except oil temp sensor problems. We believe the problem is in the wiring where the oil temp sensor hooks in . Can't seem to find information on this anywhere . Thanks for all the help . Trouble codes: 33 (mass air flow), 36 (mass air flow / burn off).
2001 Chevrolet Impala 3.4L BatteryDrain VIN: 2G1WF55EX1
hey guys and gals, sorry for taking long. the car is finally fixed after tearing it apart we found an aftermarket cellphone module installed under the back seat tied into the power wire for the on-star. i appreciate all the help. i did check for bcm, or short ...
2003 Chevrolet Silverado 1500 LT 5.3L MIL Lamp on VIN: 2GCEK19T33
Replaced filler neck (was very rusted but still could not find a hole) and purge valve (was cheap and possible cause). When replacing purge valve, found line attached was leaking when moved or wiggled (ok when smoked). O-ring in line was leaking. Replaced a... Trouble codes: P0422 (Evap leak small), P0463 (Fuel level sensor).
2000 GMC Sierra 1500 SLT 5.3L Misfire VIN: 1GTEK19T1Y
Performed crank sensor variation re-learn and problem is repaired. Noticed the ECM fuse was new and maybe that is related? Can anyone tell us how this relearn would have been necessary? Customer states nothing was done recently to have caused it (he owned ... Trouble codes: P0300 (Random misfire).
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