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Prev Professional Automotive Repair Technical Discussions for May 12, 2004
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Open Help Requests for GM
Help Request Answers
1991 Buick Park Avenue 3.8L pwm solenoid VIN: 1G4CW53L1M
We installed a used transmission in this clunker about a month ago; it works OK, bur we have a code 26 (QDM code); all of the voltages are correct, and come and go as designed, except the pulse width modulated solenoid (pwm). Alldata says there is supposed to ...
1994 Buick LeSabre Custom 3.8L cruise control VIN: 1G4HP52LOR
Buick came in with no cruise-codes 1558-1561-1562.we ck'd servo vac-ok scan tested switch/brake status-all ok.substituted several used servos with same results-oddly all servos show about 20% actual servo position scan data books say this should be 0%....
1996 Buick Regal 3.1L Radio
Hi all, I had to replace the battery in this Regal and didn't realize the theft-lock for the radio was active. Of course, now the radio display shows LOC. Does anyone know how to unlock the radio without having to go to the dealer?
2000 Buick LeSabre Custom 3.8L tcc dc VIN: 1G4HP54KOY
hello i,ve got this oo buick lesabre that came in with a misfire code i took it for a test drive and the trans wouldnt shift unless you let up on accelerator when scanning the car i noticed that there was a pid that showed tcc dc shorted to power i tested all ...
1986 Chevrolet Camaro Berlinetta 5.0L High Pressure
This transmission was removed from an operating vehicle and rebuilt. A B&M shift improver kit was added. On startup the pressure at the port above the shift lever will start at 60-70 psi momentarily then climb to 150psi and the TV cable has almost no effect.On...
1991 Chevrolet S10 Blazer Tahoe 4.3L steering VIN: 1GNDT13Z7M
several others have worked on this before us. the truck drifts hard to the left when you hit a dip. it does the same thing when you hit a bump but not as bad. please somebody help
1991 Chevrolet Caprice 5.0L cylinders VIN: 1B4GP45R8B
hey everybody; ya the vin is bogus but i don't have the vehicle here now, the rest of the info is correct , this car has low compression in most of the cylinders (leaking past the rings), and we are going to rebuild or install a reman. She talked to a guy she ...
1994 Chevrolet S10 Blazer Tahoe 4.3L Engine VIN: 1GNDT13WXR
Hey Guys, I have a monster on my hands. We originally took in this vehicle because of a cel. Diagnose to a clogged EGR port. Removed the intake, cleaned the port and reinstalled with new gasket. During the test drive this thing started to smoke like crazy out ...
1995 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCDT19W6S
customer came in for routine exhaust repair (cat back) on 12/03/2003. aprox. two days later customer returned with rattle. found broken catalyist in converter. replaced with aftermarket universal conv.customer returned in janurary with check engine light on. r... Trouble codes: P0138 (bank 1 sensor h02s)
1996 Chevrolet C3500 Cheyenne 6.5L No Start VIN: 1GBKC34F2T
Truck ran out of fuel. Customer replaced rear tank unit because it read full on the gauge. When it still showed full He brought it to me. Found a blown fuse. Came back next day with fuse blow. Replaced secondary pump and now the fuse does not blow but it does ...
1998 Chevrolet Express 2500 5.7L engine VIN: 1GAGG25R4W
This Van came in the shop with a very strange noise. The noise starts only when the engine is totally warmed up and the temp guage is at operating temp. It has a squeak that sounds exactly like belt noise but is coming from around the rear main seal area. We h...
1998 Chevrolet Tahoe LS 5.7L overdrive VIN: 1GNEK13R2W
When driving in overdrive at speeds of 40 mph and above transmision seems to buck, if I drive with it in 3rd Gear condition does not occur. Originally when this happened it also had a load noise from the rear end and it would jerk and make noise. Tore down rea...
1998 Chevrolet K2500 Cheyenne 5.7L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1GCGK24R4W
This truck only acts up after fully warm and acts like a lean miss at cruise and idle (in gear and/or park). The fuel trims show commanding for more fuel eventhough o2s are both high. AT WOT no miss is detected and the missfire counters are always at 0. If ind...
1996 GMC Yukon SLE 5.7L Cuts out, Stall VIN: 1GKEK13R5T
I've got a yukon 5.7r that cuts out right at or just after tip in when accellerating from an intersection. I personally have not experienced this myself. I drove the vehicle over the weekend for at least 125 miles with the tech2 ready to snapshot but nothing h...
1997 Pontiac Grand Prix GTP 3.8L headlights VIN: 1G2WP1214V
cust states int.when driving headlamps start flashing,i did get it to happen once and the flashed like the security was set and the alarm was going off but quit too soon to check anything, they say it happens all the time usually over bumps, thanks for ant hel...
1999 Pontiac Grand Prix GTP 3.8L MIL Lamp on VIN: 1G2WR5211X
Good morning fellow techs. I have this car that will set these 4 codes what appears to be at the same time intermitantly. I have not been able to actually duplicate the same conditions, but the codes are in history with a service engine soon light today again ... Trouble codes: P0650 (MIL control circuit), P1637 (Generator L circuit), P1653 (Low oil level circuit), P1673 (Engine hot light circuit)

Fixes & Summaries for GM
Fix/Summary Answers
1967 Cadillac deville 429CID directional switch VIN: F7100736CA
thanks to everyone who posted a reply. I made alot of phone calls to fid out that either people didn't have the part or they had a used one that was very expensive. Special thanks to Brian in Wisconsin. the web sight helped us verify that we were looking for t...
2003 Cadillac CTS 3.2L timing belt VIN: 1G6DM57N23
Hello, Finally got this one finished. Customer has taken possession of the vehicle and could not be happier. Thanks for the great help, and assistance. As I stated I did not have the instructions for the timing belt for this engine. Thanks to this great resour...
1988 Chevrolet Corvette 35th Anniversary Edition 5.7L Cuts out, Stall VIN: 1G1YY2184J
thanks to the 6 replies i received, robert from texas, explained how to substitute a resistor to confirm bad ign lock. which by the way replacing lock cylinder with new key fixed the no crank condition every now & then. stan from minn. & scott from oregon both... Trouble codes: 34 (maf sensor).
1995 Chevrolet Camaro Z28 5.7L No Start, Stall, MIL Lamp on VIN: 2G1FP22P6S
Replies were split between afetrmarket reman distributors & water pump leaking into distributor. We knew that the waterpump was not leaking. we cheked hot, cold, pressure or not. No drips & no stains. This was verified before post. We installed a new GM distri... Trouble codes: 36 (Distributor high reference error).
1995 Chevrolet K1500 Cheyenne 6.5L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 2GCEK19SXS
All replies pointed at an injection pump issue but not the case.Still awaiting for customer to bring in invoice from other shop to see what they did to fix it.Apparently they pulled the intake and did something thats very common to these.I dunno what it was bu... Trouble codes: 32 (EGR system problem), 96 (cyl bal fault 6 cyl).
1995 Chevrolet Blazer 4.3L no communication VIN: 1GNCS13W1S
I was never able to get a generic scanner to communicate with the VCM. Thru atrade contact, I was able to have someone with a Tech II scanner connect and read the data stream. Had a bad ABS wheel speed sensor. Replaced and corrected.
1999 Chevrolet K2500 Suburban 7.4L Rear shoes VIN: 1GNGK26JXX
Thanks to those who responded. We replaced the rear shoes and wheel cylinders with O.E. parts. Several suggested that the wheel cylinders might possibly be sticking and not actuating the trailing shoes when backing up. Based on this, and the fact that we could...
1999 Chevrolet C1500 Suburban 5.7L No Start VIN: 3GNEC16RXX
Hey boys and girls, after all of your good advise the majority of the replies said either change the theft deterrent module or the lock and cly. After talking to the owner we both agreed that it would be prudent that we change both pieces. It started immediate...
2000 Chevrolet Express 3500 7.4L Mechanical VIN: 1GAHG39J94
The problem end-up to be the spring tension in the power steering pump, the best way to test this is, with engine running pump brakes, until hard, crack open pressure hose at hydroboost,(from p/s pump) if you have no pressure with steering wheel not turning, a...
2002 Chevrolet Malibu 3.1L Fuel gauge, temp gauge, key fob VIN: 1G1ND52J52
Well I had several replies, all dealing with communication with the BCM. I was unable to get into this system with my primitive scanner, so off to the dealer I sent him. But a funny thing happened, he left the interior light on that night and killed the batter...
1999 Pontiac Sunfire SE 2.4L engine VIN: T6X7542282
Closing without fix.Received 5 replies.Check spark plugs and checked torque of valve cover bolts.Bottom end seems to be O.K. Customer does not want to tear down to further investigate.I appreciate all that replied and a big thank you to all.If anything changes...
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