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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 22, 2005
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Open Help Requests for GM
Help Request Answers
1995 Cadillac Seville STS 4.6L Traction Control VIN: 1G6KY5294S
Good morning fellow techs. I have this '95 Caddy STS here that has a "traction Disabled" message coming on as soon as the car starts to roll, and a T073 setting in the TCS. This car came from a dealer who wanted to sell him a TCS computer, but he didnt trust t...
2000 Cadillac HEARSE 4.6L Air Bag warning VIN: 1GEEH90YXY
Vehicle came to us with air bag light on and message center saying [air bag system]. Upon checking codes we got B0051- Deplyment commanded after checking MOD and archives we replaced pretensioners that were detonated checked air bags, appear new. after powerin...
1994 Chevrolet S10 Blazer Tahoe 4.3L Hesitation VIN: 1GNDT13W3R
vehicle towed in no start,customer complaint was over past few weeks eng was running poorly,more so the longer it ran also oil level getting higher on stick.to make long story shorter.found inj nozzle for cyl 5 dislodged from port hole,also found main fuel lin...
1996 Chevrolet C1500 5.7L timing VIN: 1GCEC14R0T
Vehicle shows negative timing (-18) on scanner. Checked cam reading says 0. Checked dist for alignment good. No alignment cam crank codes. Anyone ever ran across this? Truck runs pretty good, poor milage little lack of power. Stumped!!! Hope someone can steer ...
1997 Chevrolet K1500 Cheyenne 5.7L power steering VIN: 2GCEK19R7V
Vehicle came in with no power assist. Replaced pump with aftermarket rebuilt which appeared to work. Before picked up, pump would not turn steering at idle. No pressure test as I do not have pressure set up. Fluid was changed. Vehicle has EVO but everyone I ta...
1998 Chevrolet K3500 Cheyenne 6.5L engine VIN: 1GCHK33FOW
have 6.5 diesel that sucks air into the exhaust pipe and white smoke out the intake. is new motor never ran from auction. any ideas
1999 Chevrolet Silverado 1500 5.3L Hesitation, MIL Lamp on, no power VIN: 2GCEC19T7X
truck was brought in for a complaint that check engine light on and no power. has a code for tps performance no problem found with tps. has no power until you get over 2000 prm. in shop if you try to load engine in gear it has completely no power. all scan too... Trouble codes: P0121
2001 Chevrolet Silverado 1500 5.3L No Start VIN: 2GCEC19T91
this truck only does this for our customer we have not been able to get it to do it since we put thenew pump in I have swaped the horn relay and the fuel pump relays to see if this helps and answer is nope there are no codes and ive checked to see if it does i...
2002 Chevrolet Suburban 1500 LS 5.3L Tensioner on A/C VIN: 3GNEC16Z62
The A/C belt tensioner will jump alot if RPM is at around 1300 and make a real bad rattling nosie checked pullies compressor clutch bearing spins freely no noise on A/C puuly checked A/C pressure those where good I want to thank anybody that can give me some t...
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13S32
This one has a p0171 bank 1 lean. Fuel pressure is 54 psi. LT trim is at 20+ at idle.. I used the smoke machine 3 different times with no results.. Tried spraying down the intake, vac hoses, injector rail, t-body, etc. with no changes in fuel trim numbers. I a... Trouble codes: P0171
1995 GMC Yukon SLE 5.7L Hesitation, Surge, MIL Lamp on VIN: 1GKEK13K5S
i am plagued by a check engine light for an egr code. have checked egr passages and they are sparkling clean. have tried a new egr vacuum control valve [it was cheap]. have swapped out map/vacuum sensor with known good one. have checked tps per alldata instruc... Trouble codes: 32 (exhaust gas recirc error)
1997 GMC C1500 Sierra SL 5.7L Misfire VIN: 1GTEC19R4V
Hi Gang. I broke the cardinal rule on this truck. i threw parts at it starting with a new set of ignition wires, this usualy fixes a missfire. next we installed a new cap and rotor,as they were original and looked coroded. no change. I then tried a coil, and t...
2002 Oldsmobile Bravada 4.2L transfer case VIN: 1GHDT13S02
Hello and thank you in advance for your help. I have this All wheel drive bravada that binds when turning at slow speeds. It will actually stop moving if the wheel is cut hard at slow speeds. I installed the new encoder sensor, fluid, and programmed the tccm a...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Regal LS 3.8L abs VIN: 2G4WB52K7X
thank you for all of your replies. it ended up being the ignition switch that fixed it. thank you again
1994 Chevrolet Corvette 5.7L brakes VIN: 1G1YY22P3R
thank you for all the help the problem seems to be within the abs unit. still waiting on customer ok. IF I HERE MORE I WILL POST IT
1995 Chevrolet Camaro Z28 5.7L Poor Idle Quality, Hesitation, Cuts out, Misfire VIN: 2G1FP22P9S
hello techs,what an ordeal this has been,we found that the wire harness to the optipak distributor had a weak connection replace harness and now it runs.thanks to all who responded to my call,your info was of help,most of which we had already checked,we knew i... Trouble codes: 18 (no fuel injection pulse).
1997 Chevrolet S10 2.2L 1-2 Shift Late and rough VIN: 1GCCS144XV
My Fluke Scopemeter saved the day on this one. By hooking it up and watching the VSS output, I was able to see why it shifted so weirdly. The VSS would work fine sometimes, and then it would have a flaky pattern, then intermittently just drop out. After changi...
1998 Chevrolet Astro 4.3L Power Steering VIN: 1GCDM19WXW
Thanks to all who replied, The problem with this van was the new power steering pump. I bypassed the booster to narrow down the problem and when I did that I still had no power steering. I checked the spool valve in the pump and it seemed to be ok, so I replac...
2000 Chevrolet Tracker 2.0L No Start VIN: 2CNBE13C7Y
Thanks to all who replied. The Tracker is FIXED. I did repetitive hot soaks in the shop while monitoring the suspect cmp sensor with my vantage. The Tracker finally gave in and did a complete no-start and set code P0340, with no signal showing on my vantage. O...
2001 Chevrolet Monte Carlo LS 3.4L low tire light VIN: 2G1WW12E21
I beleive this car has had the wrong BCM installed. However the customer chose not to replace it. Thanks to those whom replied. Sorry for wasting your time
2001 Chevrolet Tahoe 5.3L low beams VIN: 1GNEK13T61
Hello to all and thanks to those who offered help. I checked the relay operation with my power probe and found powers and grounds good here. Checked for corrosion at relay and found none. The headlight assemblys pop right out on this model so it was easy to ch...
1991 Geo Tracker 1.6L No Start VIN: 2CNBE18U2M
the comp. was smoked burn marks on the inside casing will send off like Dale said and others said comp. the reman has the problem. thank you all
2003 GMC Sierra 2500 SLE 6.0L axle seals VIN: 1GTHC29U33
There was some confusion on the type of rear axle its a 2500HD full floating rear end, one ton. leaks both sides has abated after vent hose was shorten and cleared. This may be a warranty job as Scott mentioned, truck is like new condition. Will update this po...
1998 Oldsmobile 88 Royale 3.8L Cooling Systems VIN: 1G3HN52K7W
Most refered to the upper plenum problem which we had replaced with a NAPA replacement. I am suspicious of that replacement part but the customer has not returned to do any further work on this vehicle. Most likely it is performing ok: not using coolant, not o...
2000 Other GM Goshen Coach 6.5L compressor VIN: 5B4LP37F6Y
It's only kind of fixed. I ended up replacing the low press. hose. Refilled the system and at idle high pre. 250, low pres. 35 outlet air 40F. At high idle pres. goes to 300, low pres. 15 outlet air drops to 35F. While driving- comp. cycles 5-6 times on accel....
2000 Saturn LW2 3.0L MIL Lamp on VIN: 1G8JW82R4Y
Thanks for the tips. It was the mass air flow sensor. Trouble codes: P0102.
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