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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 30, 2009
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on VIN: 1G4HP52K6V
hello everyone. this vehicle came in on monday. at start up i noticed fuel pump noisey and a misfire. checked fuel press. it was 30psi so we put pump and filter in it. still misfire was there. checked scanner readings, all cylinders had counts on them between ... Trouble codes: P0336, P0300
1998 Cadillac Seville STS 4.6L power windows VIN: 1G6KY5495W
None of the power windows on this Caddy work from any switch. My Tech2 tells me that the door modules are getting the signals from the switches, but the windows aren't being commanded to open or close. The power door locks and power mirrors work okay, but the ...
1995 Chevrolet Monte Carlo Z34 3.4L engine
Hello I have a 1995 chevy monte carlo that seems to have a problem with going into "limp mode" were the car has no power. It seems if you put the car back into neutral or park and refire then it goes away, otherwise if you hold down the gas pedal for 3-4 secon...
1995 Chevrolet Lumina LS 3.1L Stall, MIL Lamp on VIN: 2G1WN52M3S
Some times when you start up car ,engine shuts off @ idle,not in gear.May happen 2 or 3 times,then idles fine.Car will eventually shut off after idling approx 20 min.First thoughts were to clean t. body bore and IAC pintle and bore.Did not help. Noticed during... Trouble codes: 76 (history egr 2), 77 (history egr 3), 34 (history map), 23 (history iat), 28 (history trans. range switch)
2000 Chevrolet Express 2500 5.7L Cuts out, MIL Lamp on VIN: 1GCGG25R3Y
This van dropped in this morning and was running perfect in every way except the CEL was on. The men said it would buck and cut out very intermittently. I checked and found the codes listed. The freeze frame data varied very little on the fuel trim from code t... Trouble codes: P0171 (Fuel system lean B1), P0174 (Fuel system lean B2), P0340 (Camshaft position sensor problem), P0341 (CKP circuit out of range)
2001 Chevrolet Impala 3.4L warning buzzer VIN: 2G1WF52E21
Has anyone seen this? Customer complains of key in warning buzzer inop and headlamp on buzzer inop. New bcm with good inputs and bcm communicating with pcm. Serial data line to radio seems fine and thats where the Dealer says the buzzer is. Radio sent out to G...
2001 Chevrolet Prizm 1.8L headlamps VIN: 1Y1SK52831
Hello I have this chev prizm here where the headlamps stay on all the time. I saw in the archives abount a tsb from gm but could not find the article. When i pull the DRL relay or the headlamp relay the lights will go out. when i plug the relays right back in ...
2006 Chevrolet Trailblazer LS 4.2L Rearview Mirror VIN: IGNDT13S26
Ok this customer of mine purchased a used Trailblazer and he wants to know the cost of installing the factory rear view mirror that has a compass and the temp in it. His current one only has the airbag indicator. Can this be easily done? I know I will need the...
1999 GMC Sierra 1500 SL 5.3L fuel gauge, oil pressure gauge, brake light, secur VIN: 1GTEK19TM0
My brother in laws truck is a ninety nine new body style gmc sierra. It is doing some funny things and I dont know really where to start or what to test. The brake light, the security light stay on constant on the instrument panel. The fuel gauge and oil press...
2000 Pontiac Bonneville SSEi 3.8L Starting VIN: 1G2HZ5412Y
Hey, We have a problem with consistant no start if ignition key is turn to crank position right away, if we wait for about 2 seconds with key in ignition position engine starts every time. We also noticed that instrument cluster back lighting and gauges have a...
2003 Pontiac Bonneville SE 3.8L Fuel Injectors VIN: 1G2HX54K83
I have GOOD square wave(as per "iATN's" waveform files) to PCM. Thus, the Low res.(430 #8) Medium res.(647 #9), CMP signal(630 #7). The Engine Speed Signal(121 [C2]#8) is a 10v. Square wave "about 6 per second". Fuel is 47psi, with Great Spark. It "acts" lik...
1999 Saturn SC2 1.9L No Start VIN: 1G8ZH1270X
Hi Thank you For Any Help , I Have a Saturn With The Dual Over Head Cam 1.9 , Orignally the problem i had with this car was that when it sits outside over night it won't start untill you push the car inside and let it warm up for an hour and then it will start...
2003 Saturn Vue 3.0L internal engine VIN: 5GZCZ63B63
We have noises from what we believe are the intake runner flaps inside the plenum. The plastic flaps would be an appropriate fit for what we feel is making the noise. We are aware of the updated springs to inprove intake vacume leaks but I do not see how this ...

Fixes & Summaries for GM
Fix/Summary Answers
1986 Chevrolet K30 Custom 7.4L master cyl linkage VIN: 1GDJK34W3G
good day all thanks so much to the 8 techs that took their time to reply to our problem child. what we believed happened was safety start switch failed & as one of the replies stated the guy with the big leg tried to push pedal thru the firewall.the rod on mas...
1996 Chevrolet Tahoe LS 5.7L relay VIN: 1GNEK13R1T
Well after much perseverance I finally found it. This morning I was able to get the realy to click a couple of times. I had to remove the bracket holding the keyless entry module, door lock relay and airbag module which are locatedabove the gas pedal. The rel...
2000 Chevrolet K3500 7.4L transfercase 4470 VIN: 1GBJK34J0Y
In summary, Im going with Brians thoughts. I suspect the clutch coil is soaked or something mechanical in the T-Case. Owner needed vehicle back at this time. Got the T Case in 4wd and vehicle will return at a later date. Thanx
2004 Chevrolet Tahoe LS 4.8L Mechanical VIN: 1GNEC13V14
Well first I want to extend a big thank you to all of you that replied to this post. Your helpful suggestions are always appreciated. Now this is also a lesson don't forget the basics. I listened to this noise quite a bit and even with a stethoscope,and would ...
2005 Chevrolet Astro 4.3L oil dip stick VIN: 1GCDM19X35
First of all, THANK YOU, for the help. the feed back was very helpful in trouble shooting the issue. the fix seemed to have been adding a ground strap from the Alternator bracket to the Neg. battery terminal. I have also insulated the dip stick tube around the...
2006 Chevrolet Trailblazer LT 4.2L wipers VIN: 1GNDS13S86
Thanks to everyone who responded to my problem. I guess I just needed a little confirmation in which direction to go. We confirmed that the high wiper control blue wire was not shorted to ground and the signal switch 1 circuit pink wire was not shorted to powe...
1993 Geo Storm 2+2 1.6L No Start VIN: J81RF2366P
This Geo is fixed. Had two replies but Randall from Massachusetts hit the nail on the head . He recalled some after market scanners giving bad readings on some Geo's. Well this was one. I borrowed a TECH 2 & the computer data was normal. Replaced distributor &...
1993 GMC Vandura P3500 5.7L Hesitation, Cuts out, Stall
Many replies regarding distributor. Installed OEM distributor and no change. I am leaning towards a TBI unit. will update later on results. Thanks to all
1997 GMC K2500 Sierra SL 5.7L Poor Idle Quality, Misfire VIN: 1GTGK24R1V
thank you everyone that sent help.customer ran out of time.we tried everything that was offered to us.we replaced fuel pressure regulator,intake gaskets,tune-up parts,o2 sensors,coolant sensor,egr,distributor,crank sensor,inspected timing chain,replaced cfi.i ...
2008 Pontiac G5 2.2L dlc VIN: 1G2AL18F08
Thanks to several that stated the new module had to be flashed. We sent it out to the dealer and reprogramed the computer and also found a fuse blown to one of the sensors. This fixed it and our customer was happy to get his automobile back. I was happy to get...
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