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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 2, 2006
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Open Help Requests for GM
Help Request Answers
1999 Buick Park Avenue 3.8L tcc and 4th gear VIN: 1G4CW52KOX
The following vehicle was brought to me for a trans problem. It had 142500 miles on it at the time of origonal trans rebuild. It now has 148200 miles on it since rebuild occured. Car came in with multiple trans codes and shift problems. (0741, 1811, 1870) I ...
1995 Cadillac DeVille 4.9L Interior VIN: 1G6KD52B1S
we have this cadillac that intermittent electronics on dash will act up - the prndl lights will show up with boxes around all letters - speedo stops and odometer quits registering until problem goes away then odom updates to correct miles - info center are non...
1993 Chevrolet Lumina Euro 3.4L Balance shaft VIN: 2G1WN54X4P
Replaced the below for a large "typical" oil leak from the oil pump drive, car ran well before repairs no vibrations. I suspect the balance shaft chain timing is off. I have looked at this engine from all angles and can't see what I am missing. I'm fairly cert...
1996 Chevrolet Blazer 4.3L transmission area VIN: 1GNDT13W1T
there is a noise sounds like static, when sitting still in park, you can hear it inside the cabin, noise changes if you press accelerator pedal slightly, has anybody heard this noise before. it sounds like you left the radio on, but its not on help
1997 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W1V
Does anyone have a logical explanation for how the ECM could become contaminated with gas? I checked for leaks by hot wiring the pump and watching for a spray of gas but I didn't see any. The rubber seals on the 2 lower connectors are swollen and there is raw ...
1999 Chevrolet Tahoe 5.7L Radio, Speakers VIN: IGNEK13R8X
Hey Gm Techs, I've been trying to find the cause of this radio inntermittently shutting off. Have replaced the radio 4 times with GM reman, replaced rear speaker Amp with new GM. Have traced the rear roof speaker wiring harness, unplugged the rear roof speaker...
1999 Chevrolet Cavalier 2.2L Fluid Contamination
The transmission has been serviced on two ocassions now and both times the fluid was milky like it was contaminated with water or coolant! Checked the radiator and the coolant is still clean with no sign of oil in it. Has anybody else ever seen these cavalier ...
2000 Chevrolet Suburban 1500 LT 5.3L hard starting VIN: 3GNFK16T6Y
Hello fellow techs, Had this Suburban come into the shop for hard starting after hot soaking. I have tested for codes and none found. This vehicle will take up to 30 sec. to start after setting for more than 30 mins. after it is hot. When cold, it starts right...
2000 Chevrolet Silverado 1500 5.3L Hesitation, Surge VIN: 1GCEK19TXY
Hi guys. This Chev is killing us. It is an intermitt. problem Seems worse cold but will do it any time. Going down the road @ cruise speed, in overdrive, vehicle will exihibit "Fuel starvation symptoms" No codes will set, but O-2 sensors all go to 0 and and ve...
2001 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC52451
Towed in by customer. They replaced the crank and cam sensors at least once, and I think more than once. Car turns over, no start most of the time. When I starts, it's fine with no problems. I get codes u1000 from all computers and u1016 from BCM. This points ... Trouble codes: U1000, U1016
2002 Chevrolet Express 2500 5.7L Cuts out, Misfire, MIL Lamp on VIN: 1GCGG25R12
Hello GM tech's Truck was purchased with this problem runs poor under load misses and at times will backfire thru intake manifold, codes will come right back PO300 and PO335. I did test the CMP sensor and the new CKP sensor. we did replace cap rotor (delco par... Trouble codes: P0335, P0300
2003 Chevrolet Silverado 1500 HD LS 6.0L Hesitation, Cuts out, MIL Lamp on VIN: 1GCGK13U03
problem is intermitten but occurs more often with cruise control engaged. the reduced power light comes and the truck will not accelerate. turning off the ignition and waiting 5 to 10 minutes then restarting the engine the problem will disappear. freeze frame ... Trouble codes: P1516
2000 GMC K3500 Sierra SLT 5.7L Excessive Emissions, Poor Fuel Economy VIN: 1GTHK34R6Y
the truck come in as a fuel leak conditon,the original tank had been hit from the bottom on a construction site & a small hole in tank was the leak after the tank was dropped we replaced tank assembly with aftermarket unit the fuel module had been replaced 30 ...
2000 GMC Sierra 2500 SL 6.0L 4wd VIN: 1GTGK2448Y
hey guys i have this 2000 gmc that is in 4wd when you press 2wd button a grinding noise from transfer case and the 2wd button flashes.is this a common problem.it seems that the truck is stuck in 4wd.please help
2001 GMC Yukon Denali 6.0L No Start VIN: 1GKEK63U01
I had the battery disconnected while I rebuilt the transmission and now engine will not start. I get code B2961 key in ignition fault. The engine will start and die with starting fluid. If I clear the code it comes right back before trying to start the engine.... Trouble codes: B2961 (Key in ignition circuit malfunction)
2003 GMC Sierra 1500 SLE 5.3L Poor Idle Quality, Misfire, MIL Lamp on, Low Power VIN: 2GTEK19T63
Truck came in with owner complaining of low power & missfire. Checked for codes, Found Maf code & P0300. Cleared codes & only P0300 returns. Missfire counter shows 2,4,6,8 Missfiring. Feul press 55psi. Spark on all cylanders ok. Test injector signal on affecte... Trouble codes: P0101 (Maf Efficiancy), P0300 (Missfire)
2005 GMC Envoy XUV SLE 5.3L Rear window VIN: 1GKES12P84
Hello and thanks in advace for taking the time to read this. This truck came in with the rear window stuck in the down position. This is the deluxe modle that has the retractable roof and also has a window right behind the rear seat that can be raised to close...
1997 Oldsmobile Aurora 4.0L alternator VIN: 1G3GR62C7V
Hey I need some help! Customer brought in Aurora for not charging. The alternator tested bad so we replaced it. It now charges but it is overcharging. 15.5 volts and climbing. Shop Key diagnostic tree advised check voltage to terminal L from battery. But, acco...
1996 Saturn SC1 1.9L all shifts VIN: 1G8ZF128XT
Hey guys hope you can help me with this one.Car came in with no reverse and no foward shift. Rebuilt trans, using the one that was in the car when it came in.(was a used unit installed at an earlier time by another shop)Got finished and it has good reverse but...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac Seville STS 4.6L oil pressure VIN: 1G6KY5494X
when checking further we found the timing chain intermiadate shaft bushing worn causing shaft to wobble.this causes oil pressure to drop and rise when shaft load changes.replaced shaft and bushing.
1994 Chevrolet S10 4.3L No Start VIN: 1GCDT14Z7R
I changed the pump and this seemed to correct the problem. Voltage is now the same as battery voltage. The pump was dead, even with a direct hook up to the battery. Thanks very much to all that replied...you guys rock!!!
1997 Chevrolet Blazer 4.3L wiring VIN: 1GNDT13W4V
Well boys and girls this one is fixed. Removed complete dash assembly and inspected all harness routing for abrasion or pinching...none. Unplugged and inspected every connector (lot's of them!),all were undamaged and in very good shape. Resorted to the 'sniff ...
1998 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 1GCEK19R0W
after checking the power again as suggested by so many i found i had sufficient voltage and proceeded to take the tank down to re-replace the pump i decided to check out the ground my tech said was okay and found a solid break in the ground wire(hard to see if...
2003 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK24113
Hi: In order to check these systems out you need to have a tech 2.If you can command fuel rail pressure to 160mpa, more than likely the injector pump and fuel regulator are ok. This also tests the return rate on the injectors, but on an intermittent issue like...
2000 GMC C-Series Topkick C6H042 7.4L No Start VIN: 1GDJ6H1D6Y
thanks for the replies, ran alternate ground wire to thermostat housing.
1995 Oldsmobile 88 Royale 3.8L motor swap VIN: 1G3HN52K75
Got 7 replies on this one 3 said its a possible swap but many parts need to be changed.From what i can see intake manifold,exhaust manifold,fromt cover,some electronics,and the one that put a stop to this job was the power steering pump bolts directly to the b...
1995 Oldsmobile Aurora 4.0L Poor Idle Quality, Misfire VIN: 1G3GR62C4S
Thanks to all that responded. Especially due to the lack of information and EFFORT I gave. It turned out to be the 6/7 ignition coil. My first mistake was to try identify missing cyl(s) by disconnecting injectors. Has worked for me in the past on most 6 and 4 ...
1993 Pontiac Grand Prix LE 3.1L MIL Lamp on VIN: 1G2WH54TXP
Thanks to all that responded to my problems!! Special thanks to LANEARD for the tip on revised Harness. The customers Main concern on this one was the TEMP GAUGE erratic readings and did he have an overheating problem or not? The CEL problem has been with the ... Trouble codes: A11.
1999 Pontiac Grand Prix GT 3.8L ABS / TRAC Control VIN: 1G2WP52K6X
Thanks for the info. Had 5 replies. Two suggested wiring problems. One recommended OEM Bearing. Two stated that sometimes the scan tool will revese the left and right sides on the ABS sensors. I replaced the other side bearing/abs sensor and every thing workin...
2000 Pontiac Grand Prix SE 3.1L radio VIN: 1G2WK52J6Y
Steve from N.M. hit on the head. Got the bulb from the general and fixed the radio. Thanks again Steve.
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