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Prev Professional Automotive Repair Technical Discussions for October 25, 2010
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Open Help Requests for GM
Help Request Answers
2000 Cadillac Seville STS 4.6L Vehicle Speed Sensor VIN: 1G6KY5498Y
VSS code P0502. Customer states intermittent shift problems. The vehicle will occasionally not upshift out of first gear. I have not been able to duplicate the shift malfunction. However, AllData states that P0502 may set if there is internal slipping. Basical...
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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 ...
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1996 Chevrolet S10 4.3L No Start VIN: 1GCDT14X3T
this truck is crazy it will only run if u spray it with carb cleaner.it has good fuel pressure spikes at 68 when trying to start it.the injector pulse dosent pulse but only after it is turned over a few sec.then it starts pulsing.i tryed a good used computor a...
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2001 Chevrolet Venture LS 3.4L valve train VIN: 1GNDX03E61
thanks in advance. this van is a commercial vehicle and 200 miles a day is thge norm. after a faulty connection within the underhood fuse center caused the low speed fan to not operate the driver ran it hot and cracked the cylinder heads. having replaced 3 set...
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2002 Chevrolet Venture 3.4L Fuel Gauge VIN: 1GNDX13E92
Van came in with CEL on and a fail inspection sticker. Code was P0463. Changed sending unit with one from dealer and the coded did not return. A couple weeks later the same customer comes in with van stating fuel gauge is erratic. I then replaced sender again ...
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2007 Chevrolet Express 2500 4.8L carrier bearing preload VIN: 1GCGG25V97
We have this van in here that needs pinion bearings. It's the 9 1/2 rear with adjusters (not spacers) on the carrier side bearings. I cannot find the preload adjustment procedure in Alldata. I need to know how much preload to tighten the adjusters to. Any help...
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1998 GMC Jimmy SL 4.3L heater control VIN: 1GKDT13W0W
Was brought to me because blend door motor and mode door motor cycle from one extreme to the other non stop.Hot to cold and back and from defrost to floor back and forth.Mix door maximum 98 cnts and minimum 0 cnts. Solar sensor 235 cnts.As the doors are moving...
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2005 GMC Sierra 3500 SLT 6.6L Unknown VIN: 1GTHK33275
the cust complained of the "abs","ses"& antilock lights coming on and the tranny not shifting.We have a code p0721. We have checked the tranny speed sensors and tried replacing both with the same results.the wiring to the "tcm" also checked good.We pulled the ...
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Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac Seville STS 4.6L MIL Lamp on VIN: 1G6KY5294T
Thanks to all of you guys and especially to Alex, you were right, and you know what? that was the last part of the harness that I didn't check, I never knew that there was a connector on the harness doesn't even appear on the diagrams, but, you were right, the... Trouble codes: P1626, P1602, P1604, P1610, P1611.
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1998 Cadillac DeVille 4.6L Brake Fluid level sensor VIN: 1G6KD54Y3W
Thanks everyone for your input. There are 2 different sensors for this vehicle, however, the one I needed has been discontinued and is nearly impossible to find new. I went to our local junk yard and got 2 used sensors for the shop so we will have one if we ...
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1998 Chevrolet Camaro Z28 SS 5.7L Door Locks VIN: 2G1FP32G7W
First of all id like to thank everyone who offered help...turned out to be the blue\white dome light wire was shorted down near the convertible top motor is located...repaired the burned wire and all fixed! Again thanks everyone!
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1999 Chevrolet Tahoe 5.7L Cooling Systems VIN: 3GNEK18R1X
THE GENERAL CONCISES WAS TO REPLACE HEATER CORE AND CHECK FOR A RESTRICTOR IN THE HEATER FITTING. TRUCK WILL BE BACK NEXT WEEK FOR NEW CORE. THANKS FOR ALL THE QUICK REPLIES AS ALWAYS IATN ROCKS. HAVE A GREAT WEEKEND. WE REPLACED CORE AND FOUND A CHUNK OF SILI...
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2000 Chevrolet Camaro Z28 5.7L MIL Lamp on, Will not fill fuel VIN: 2G1FP22G1Y
The general consensus is that the evap vent valve is the problem. Our customer lives far away but we have relayed the results to him and we will arrange to replace the vent valve in the near future. I will post the results when we find out if it indeed fixes t... Trouble codes: P440A.
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2001 Chevrolet Silverado 1500 4.3L Misfire, MIL Lamp on VIN: 1GCEC149W1
THanks to all who replied thoughtfully. Turns out there were two seperate issues. The first was the customer installed the wrong fuel pressure regulator causing a low fuel pressure. Dont think that pinching the hose off will always find this. This caused the l... Trouble codes: P0171 (Lean Bank One), P0174 (Lean Bank Two), P0300 (testing and results).
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2002 Chevrolet S10 2.2L Evap & secondary air VIN: 1GCCS14532
Thanks to everyone who replied! With the replies and some common sense we got this one fixed. Richard McNicols recommended checking the mode 6 data. We did that and the test showed passed but was close to the limits! Dennis [...] replied the coolant & air tem...
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1996 GMC Safari SL 4.3L Misfire, MIL Lamp on
Thanks for all the help. Found it was the injector. Customer declined repairs at this time. Trouble codes: P0300 (Random cylinder misfire).
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1999 GMC K2500 Suburban 5.7L Passlock VIN: R8XG546063
thanks for all the help.the passlock module was replace and every works ok so-far.sorry it take solong to reply.was waiting on customer.
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2005 Pontiac Montana SV6 3.5L Poor Idle Quality, Surge, Cuts out, MIL Lamp on VIN: 1GMDU23L05
thanks to all that replied as most said it was the ecm ..in the end i had to remove the grey 5 volt reference wires from the ecm to make sure the 10.5 volts was coming out of the ecm not feeding back to it .. it was coming out of the ecm ..even with the k...
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2009 Pontiac Montana SV6 3.9L Left Side Signals VIN: 1GMDV23149
turns out that the shorted left front signal bulb was the problem. replaced bulb and havent had any problems since. thanks to everybody who replied.
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