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Prev Professional Automotive Repair Technical Discussions for July 18, 2008
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1998 Buick Park Avenue 3.8L High Idle Speed VIN: 1G4CW52K3W
The intake was replaced because it exploded. After the body shop installed the new one the vehicle wouldn't crank over. All the moduals communicated with the Tech II except the ECM. All the power and grounds checked so I bought a service unit from GM and insta...
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1996 Chevrolet C1500 Suburban 5.7L Hesitation, Misfire VIN: 1GNFK16R6T
Help, my own truck is killing me! What started out as a very intermittent glitch that was barely noticeable has turned into cylinders misfiring and the truck still drives but is not much fun to drive anymore. I have mostly cyl. #4 misfiring but they all will d... Trouble codes: P0300
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2000 Chevrolet Astro 4.3L RAP (retained acc. pwr) VIN: 1GNDM19W2Y
Main problem that I need help with is RAP (retained accessory power) system is not working. Followed flow chart to determine BCM is faulty. Replaced BCM and had reflashed without fixing problem. There is an update flash for the BCM RAP circuit, but no bulletin...
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2001 Chevrolet Tracker LT 2.5L radiator VIN: 2CNBJ63471
Hello, hopefully someone has come across this before. Vehicle came in with a broken seam on the radiator, also had a brown sludge like substance in the radiator. I thought it was an trans oil cooler leaking on the radiator. So I replaced the radiator and t-sta...
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2002 Chevrolet Malibu 3.1L Temp gauge VIN: 1G1ND52J22
the radio, A/C comp, temp gauge will go dead at times, can restart 10 to 15 times again before the problem reapears. Any time these systems are down if you use the power door lock switch they will all come back online. Checked voltages for power and ground to ...
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2002 Chevrolet Express 3500 5.7L batt light VIN: 1GCHG35R92
Vehicle came in with an intermittent batt light on. Replaced alternator and it came back with same problem. After reading the posts on the aftermarket alternators, I replaced with another new unit. The alternators are "new generation" units that I have had ver...
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2004 Chevrolet Silverado 3500 6.0L rotors pads calipers VIN: 1GBJC34U44
Hello fellow IATN members. We have a 3500 Chevy box truck. The truck is eating up rear pads rotors and calipers every 3000 miles. The truck returns to the shop with a blown out caliper and the rear disk rotors split into two pieces. Just wondering if anybody h...
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2004 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC12F44
Here we go again.No start,Intermitant.this car will start for weeks at a time.seem to be losing power to fuel pump.no codes and when running 55psi fuel pressure.I was able to get a no start one time only and had no fuel pressure.next time turning the key start...
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2004 Chevrolet Tahoe LS 4.8L vehicle is possibly in reduced power mode, but does not show on display VIN: 1GNEC13V34
need to know if anyone has dealth with such a problem, as mentioned in the repair history?
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2005 Chevrolet Colorado Z85 LS 3.5L Radio/power windows VIN: 1GCDT136X5
After truck is shut off and all systems powered down.The Radio will power back up.The "Raps" (Retained Accessory Power Relay) is being powered back up so there is also power to the windows and wiper switch.Customer also complained of the horn honking on its ow...
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1984 Pontiac Fiero SE 2.5L Engine VIN: 1G2AF37R7E
This vehicle had the engine rebuilt a while ago and had been operating normally. The vehicle was invlolved in a collision and the engine saw very high RPM, according to the customer, due to the clutch having been depressed while the engine was floored. Since t...
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Fixes & Summaries for GM
Fix/Summary Answers
1983 Cadillac DeVille 4.1L Hesitation VIN: 1G6AD6989D
FIRST THANKS EVERYONE FOR THEIR RESPONSES, JAY, JAMES, AND LESLIE, HIT IT PERFECTLY. I CHECKED ON ALLDATA WITH THE 84 CADI AND FUEL PRESSURE SHOULD BE 9-12 PSI. EVEN WITH THE RETURN LINE CRIMPED OFF THE PRESSURE WOULD NOT GO HIGHER THAN 6.5, SO WE REPLACED THE...
12
1998 Chevrolet Malibu 3.1L #1 Misfire VIN: 1G1NE52MOW
Thanks to all the replies that I got. Many commented about problems with head gaskets. So while I had the intake manifold off I applied compression into clyinder through plug hole and gurgling can from coolant ports in heads. I pulled the heads and sure enoug...
28
2002 Chevrolet Silverado 2500 HD 6.6L No Start, Poor Idle Quality VIN: 1GCHK29112
Thanks to all the 11 chaps who sent in replies on this one,you were all bang on with your diagnosis a couple of injectors were leaking around the solenoid area, not easy to spot even with oil dye and a black lamp and flying blind without a Tech 2.The customer ...
11
2002 Chevrolet Impala LS 3.8L MIL Lamp on VIN: 2G1WH55K42
The vehicle is fixed,new MAf sensor cured it. As I said in my help request,I put a new pigtail on because the readings would be all over the board when I wiggled it. Readings were better after the pigtail,but it would sometimes read o grams per second after re... Trouble codes: P0102.
7
2005 Chevrolet Equinox LT 3.4L abs VIN: 2CNDL63F65
Well guys, Alex [...] had a great idea,(wish I'd thought of it, it seems so simple) swap l/f and r/f sensor circuits right at ebcm and road test to set code and see if it follows sensors. So that is just what I did. Drove vehicle 130 miles and no code return...
4
2008 Chevrolet Uplander 3.9L Reverse lights VIN: 1GBDV131X8
Thanks for all the help everybody. We installed a relay in the left rear corner of vehicle, used the key on circuit for the rear AC blower (Yellow wire) to energise the relay, connected the hot side of the backup alarm to the reverse light wire and grounded th...
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1992 GMC G2500 Rally STX 5.7L Poor Idle Quality, Cuts out, Stall VIN: 2GTEG25K2N
I HAVE REPLACED DIST NEW GM REPLACED THROTLE BODY COMPLETE REPLACED COIL KNOCK ,PCM , CAP ROTOR WIRES , AND NO CHANGE IT ONLY HAPPENS IN CLOSED LOOP SO WERE GOING TO ORDER A PROM AND SEE WHAT HAPPENS.
9
1995 GMC Jimmy SL 4.3L No Start, Cuts out, Stall VIN: 1GKDT13W5S
well, we ended up replacing the fuel pressure regulator. we drove this thing for about 20 miles without so much as a stumble. we let it sit and run for about a half hour and drove it some more. no problems. we asked the customer about the fuel filter and he ad...
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2000 GMC Jimmy Diamond Edition 4.3L 4x4 light on VIN: 1GKDT13WXY
found some corrosion at module. replaced module and wiring pigtail. all is well now. thank you for all the replies.
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2001 Oldsmobile Silhouette Premiere 3.4L cruise control VIN: 1GHDX23E91
Hey, all. I have found the fix thanks to your help. As I was removing the air filter box, I found 4 wires in the pcm harness that were rubbed through. I found this in the harness as it comes out of the pcm and loops to the inside of the left head light. I repa...
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