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Prev Professional Automotive Repair Technical Discussions for May 18, 2011
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Open Help Requests for GM
Help Request Answers
1999 Buick Century Custom 3.1L engine VIN: 2G4WF52M7X
This car belongs to a member of the US Army on sick leave who has limited funds.The car has no oil pressure is noisey but still runs.I think the screen on the oil pump is clogged due to lack of proper oil change.The oil is dark brown but not tar black.Found oi...
1997 Cadillac Seville STS 4.6L Excessive Emissions VIN: 1G6KY5297V
ok so it fails provincial e-test. passes at idle but just passes at idle (at limit) runs fine. temp at converter inlet (@ o2 sensor) is 402f temp at converter out (@ o2 sensor) is 153f its an aftermarket, i suspect it could be the major problem. no codes st tr...
1964 Chevrolet Corvair 2.7L RF Interferance VIN: 40967W1096
Hoping someone can tell me what condenser to use for radio supression. I called 3 major parts stores and no one knew. I have ignition cabinets full of old time parts but none of the books list it. Will a DR60, DR70, or DR90 work? These are the Standard brand p...
1990 Chevrolet K1500 Silverado 5.7L Surge VIN: 1GCDK14K2L
This truck has a lean surge to it. The o2 sensor will go lean, under .200, just above idle and at this time the int is 128 and block learm is 128 sometimes 132. Neither will go up as the o2 sensor stays lean. I have run it on motorvac and still same results. A... Trouble codes: 32 (Egr)
1999 Chevrolet Cavalier LS 2.2L Cruise VIN: IGIJF5243X
All signals are good to cruise module except inhibit signal, what signal should be on it?
2001 Chevrolet Silverado 3500 6.6L No Start, no injector pulse VIN: 1GDJK34171
Good evening everyone, Vehicle had weed killer put in tank by accident, ran until it quit, tank topped off with diesel fuel, didn't start, was towed to a shop elsewhere that told them motor was shot after fuel system was cleaned out. Customer installed used m... Trouble codes: P0380 (Glow plug circuit), P0540 (Intake air heater circuit), U1000 (Class 2 communication fault)
2002 Chevrolet Impala LS 3.8L Electronic VIN: 2G1WH55K92
Ok so Im getting confused.Customers complaint is ac inop.confirm complaint found low on r134a (on ecacuating scale showed 1.1 lbs. system holds 2.25)evacuated and recharged w/ dye compressor now kicks on 5 seconds after sarting car but shuts off within 3 secon...
2002 Chevrolet Trailblazer LS 4.2L Hesitation VIN: 1GNDT13S82
02 Trail blazer came in for Insp/Emiss fail had codes for Upstream O2 and low cat efficancy. Customer said had at dealer and they said he need converter but wanted way to much. Replaced Converter with aftermarket from NAPA their brand. Also replaced upstream a...
2005 Chevrolet Trailblazer LT 4.2L Ebcm VIN: 1GNDS13S45
Hi, I've got this 05 Trailbazer with ABS light and brake light on, also "service brake system" in cluster display, no codes anywhere. I found and performed TSB #04-05-25-002E, and test drove vehicle, all the lights returned within 1 mile. after returning to th...
2006 Chevrolet C4500 Kodiak C4E042 6.6L MIL Lamp on VIN: 1GBG4G1226
maf sensor readings seem to be abit high at idle ]40gmps] but i am finding out that other vehicles with this code seems to be normal. or am i missunder standing. one thing iam noticing is that there is a pid called [egr position variance] and nowhere can i fin... Trouble codes: P0101
2007 Chevrolet Equinox LT 3.4L Computer VIN: 2CNDL73F27
This Equinox came in with stabilitrak and traction control lights intermittently coming on.. The vehicle was sent to the Chevy dealer to Reprogram EBCM and PSCM per bulletin. Same problem occurs with codes P0131 and P0140 returning. The problem happens very ... Trouble codes: U0131, U0140
2005 GMC Envoy SLT 4.2L Misfire VIN: 1GKDT13S05
This vehicle came in with the a p0302 code. The misfire only happens between 600 and 900 rpm and happens 70 percent of the time. We perform a compression test, running compression test, replaced spark plugs, swapped coils, smoke test the intake and replaced th... Trouble codes: P0302
2008 GMC Yukon SLE 5.3L Valves VIN: 1GKFK13058
Truck is back with a tapping/squeaking noise around cylinder 5. We do not have the tool to check oil pressure at this time, oil gauge shows to be normal. Intake vacuum is good. We also checked exhaust for vacuum and did not find any.
2003 Oldsmobile Silhouette Premiere 3.4L Cooling Systems VIN: 1GHDX03E03
2003 olds silhouette 3.4 vech. ideling temp hand will go 3/4 to hot before fans come on . fans come on at 228* cool down to 199* and climb back up to 228* driving vech runs 196* to 204* halfway customes says hand never has gone that far ideling ,deos any one k...
1996 Pontiac Bonneville SE 3.8L No Start VIN: K7T4219341
This car came from other shop.Vehicle turns on but shuts off. Vehicle doesn't have enough fuel pressure,pressure was measured between the fuel pump and the filter(7psi). Scan tool only provides crank sensor 18X signal with a question mark.

Fixes & Summaries for GM
Fix/Summary Answers
1995 Chevrolet K3500 6.5L No Start, hard starting VIN: 1G8KC34F0S
Set injector pump timing as several suggested, looking at why computer will not command glow plugs on. Since this vehicle had a replacement computer installed, I am still trying to get a computer from the supplier. When I finally get a replacement will post ... Trouble codes: 36 (Injector pulse width long).
2001 Chevrolet Silverado 3500 6.6L oil cooler? VIN: 1GCHK29151
We also called a local GM diesel specialist, who told us that the only thing that could leak up high on the back of the motor was the rear flywheel cover, (a dried trail of dexcool was visible arounf the oil cooler elbow on the left rear of the motor). We rep...
2005 Chevrolet Cobalt SS 2.0L No Start, No crank VIN: 1G1AP14P65
probable bad bcm.customer decided not to fix vehicle becuse of cost of other repairs(eng mech issues). Trouble codes: B3033 (Security system indicates tamper), B2960 (Security system sensor data incorrect but valid), P0315 (Ckp variation not learned).
2002 GMC Savana 2500 5.7L Monitor Status VIN: 1GTGG25R12
shop that had car finally called he removed fuse for cng and analyzer the looked at ecm with all monitors complete so we will call this fixed thanks to all who replied. pete
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