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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 15, 2009
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Open Help Requests for GM
Help Request Answers
1997 Cadillac DeVille 4.6L pcm VIN: 1G6KD54Y1V
Towed in with crank no start. Security system malfunction displayed on IPC: "Theft system problem, car may not restart". Did some research and concluded that since the engine cranks there is not a problem with the VATS. Tried to pull codes from the PCM but the...
1993 Chevrolet Beretta GTZ 2.3L MIL Lamp on VIN: 1G1LY15AXP
This Beretta with a quad 4 sets a dtc 32 for egr error after it runs for about 30 seconds. There is no egr on a quad 4 & no code 32 diag for a quad 4. I replaced the ecm & prom with factory parts & it was no help. Otherwise car drives fine. Any ideas would be ... Trouble codes: 32 (egr error)
1995 Chevrolet Lumina 3.1L No Fan Actuation VIN: 2G1WL52MXS
The engine cooling fans do not appear to operate when the engine coolant temperature exceeds the normal range. With a scan tool connected, I allowed the coolant temperature to reach 215 degrees F. Neither of the cooling fans turned on. I have a factory manual ...
1997 Chevrolet Astro 4.3L Speedometer Odometer VIN: 86BNHM9471
Speedo drops out and bounces with turn signial. Mostly left.Other gauges seem unafected. Is there a commom point other then grounds? I have pulled the firewall junction block found it cleen, no green funk. checked wireing under battery no problem found. The Wa...
1999 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC14W6X
hi guys this is a tough one truck came in with a no start checked everything all paths lead to bad pcm replaced with new reflashed unit still no start . played the parts swapping game to no avail went through alldatas no start diagnostic procedure all paramite...
1999 Chevrolet S10 LS 4.3L Misfire VIN: 1GCCS19X6X
2001 Chevrolet Silverado 2500 HD LS 6.0L unsupported systems VIN: 1GCHK23U51
trying to do emissions testing on this vehicle and it fails due to readiness. not ready moniters = 0 02 sensor completed 02 sensor heater = unsupported cat. conv.= unsupported sec. air= unsupported egr= unsupported evap = unsupported we are clearing and driv... Trouble codes: N/A
2004 Chevrolet Trailblazer LS 4.2L MIL Lamp on, P0106 Map sensor VIN: 1GNDT13S14
Car Originally came in with MIL on & no power on acceleration.Map sensor code P0106 , Coolant sensor code P0128 , O2 lean code & O2 rich code & system lean code. Found Restricted CAT & replaced that & the upstream O2 sensor. Road tested & MAP sensor code came ... Trouble codes: P0106 (MAP sensor performance)
2005 Chevrolet Silverado 2500 HD 6.6L Hesitation, Surge VIN: 1GCHK23D66
this vehicle looses power and falls on its face on heavy acceleration. sometimes at slower speeds but all the time at speeds around 80mph if you accelerate hard. the boost psi drops down from around 30 to about 5. no codes. i am trying to check the fuel system...
2006 Chevrolet Impala LT 3.5L No Start, Stall, MIL Lamp on VIN: 2G1WT58K86
Vehicle has intermittent No Start, door locks cycle, dash gauges go to zero and ABS traction control light comes on. The last time this happened vehicle hit a big pot hole and vehicle stalled. The other problems were happening previous to the vehicle hitting t... Trouble codes: U0140, U0073
2007 Chevrolet Cobalt LT 2.2L heater core VIN: 1G1AL55F37
heater core has black spot in the middle of the core. has no metal or scews near it. i know that its electralis, but what do you recomend to stop this from happing again? has been flushed and chaged to green coolent when the core was replaced last year. i wil...
2008 Chevrolet Silverado 1500 WT 5.3L cruise control VIN: 3GCEC13J58
LIsten to this, long story. My customer owns this 2008 Chevy pick-up with no factory cruise, but wants us to install this option. Heck yea we will try anything. Did some research, with the help of identifix, seems like all we have to do is replace the clock sp...
2003 GMC Savana 3500 6.0L Poor Idle Quality, Surge, high idle speed VIN: 1GJHG39U73
This 15 passenger van came in with a high idle complaint and a P0507B high idle speed code. I started it cold and it idled a little high, but not bad. I hooked up the scanner and it would give me the DTC but no datastream on the manufacturer screen. It would g... Trouble codes: P0507
2005 GMC Canyon Z71 SLE 3.5L Driveline VIN: 1GTDT13605
This truck develops a driveline vibration above 40 mph. It only happens on smooth road and will go away if you hit a bump or if you engage 4 wheel high mode. Once you do that it will go away for a while and eventually return. It is intermittent and does not ha...
1998 Pontiac Grand Prix GT 3.8L blower motor VIN: 1G2WP12K1W
I have a 98 Grand Prix that came in for a/c blowing only on high. We had replaced the resistor for this problem about 3 months ago and it is now doing it again. The only difference is that this time when you turn the blower know off of high to the next lower s...
2004 Pontiac Sunfire SE 2.2L Stall VIN: 1G2JB12F44
I have a 2004 Sunfire that sometimes after the vehicle is warmed up & you come to a stop & and sit still in gear or park at idle for 20 seconds to 3 minutes will just stall. It feels as if you just turn the key off. When its happening its verry consistent. But...
2003 Saturn Ion-2 2.2L Poor Idle Quality, MIL Lamp on VIN: 1G8AJ52F83
we have this saturn in our shop with a check engine lite on-- codes-p0130---p1133-both related to o2 sensor fault-when it runs at idle it shakes but not all the time-customer also states that it will run rough while driving-those are the only two codes that ke... Trouble codes: P0130 (o2 sensor fault-bank one sensor one), P1133 (ho2s bank one sensor one-not switching)
2003 Saturn L200 2.2L odometer/d r l's VIN: IGJU54F93Y
cust stated that 2 days ago the car had approximately 82.000 miles on it, he went to drive the car one day and all the lights on the dash started flashing and the daytime running lights stopped working, then the odometer reset itself back to 68,478 miles and n...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac Seville STS 4.6L temp door VIN: 1G6KY5490X
You were all right on the mark! I reclaimed the R134 to find just one half pound in a 2 pound system. I was really suprised the compressor could run and cool the car on the passenger side with such a low charge in the system. Thanks everyone for the help!
2000 Chevrolet Express 3500 6.5L Stall VIN: 1GCHG39F8Y
Well everyone pretty much had this one. It was the injector driver module. I had the hardest time finding this relocate kit. I was unable to locate one here in Canada but I ordered one from Heath Diesel, they were great to deal with, the only problem was the b...
2001 GMC Sierra 2500 SL 6.0L Poor Idle Quality, Misfire, MIL Lamp on, low power VIN: 1GTGK29U31
This vehicle is fixed,mike [...] hit the nail on the head. For some reason the b1s1 o2 sensor would intermittantly short to power and drive the fuel trims way negative never setting an o2 code. Then just clear up, no pattern or reason. Thank-you for all the o... Trouble codes: 300 (Random misfire).
2004 GMC Yukon SLE 5.3L MIL Lamp on VIN: 1GKEK13TX4
This truck is fixed thanks to all of you. Some of you told me to check the EGR and try unplugging the O2s but this truck is not equipped with an EGR system. I didn't bother unplugging the O2s because they were new.(or at least one of them) One of the guy... Trouble codes: P0171 (Bank 1 Too Lean), P0174 (Bank 2 Too Lean).
1990 Oldsmobile Delta 88 Royale 3.8L Cuts out, Stall, MIL Lamp on VIN: 1G3HY54CLH
I want to thank everyone who replied. Taking time out of your busy lives to help others is really cool. Well I think we got it fixed, We are a subaru shop and only work on this car because I coach thier daughter. Anyway, I found a melted wire to the cam senso... Trouble codes: 41.
1997 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX52K7V
REPLACED AFTERMARKET BALANCER with NEW GM BALANCER. thanks for all the replies. special thanks to Mike from Oklahoma. he suggested that possibly the aftermarket balancer would be poorly made and not meet GM's spec. he was right. we removed their balancer and c...
1998 Saturn SL 1.9L Engine VIN: 1G8ZF5288W
Per the replies and the other fixes found on here, we decided against reinstalling the cylinder head and installed a replacement from Alabama Cylinder head. We sent the cylinder head out to a local machinist who couldn't find any indication of a crack. He didn...
2003 Saturn L200 2.2L MIL Lamp on VIN: 1G8JU54F83
Well haven't been able to spend any time with this vehicle, the replies i recieved talked about false information, or a bad o2 sensor. I think its the ecm confused, or a short to voltage some where confusing the ecm. The numbers recorded were all from the fre... Trouble codes: 172 (ststem rich), 171 (lean), 171 (lean).
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