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Prev Professional Automotive Repair Technical Discussions for November 2, 2009
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1995 Buick Regal Gran Sport 3.8L No Start VIN: 2G4WF52L45
vehicle will fire when cranking and try to start but wont quite run, it has 45 psi fuel pressure, new spark plugs and is a low mileage vehicle no codes. anyone have any ideas on what to check ?
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1995 Cadillac Seville SLS 4.6L No Start VIN: 1G6KS52Y3S
To all; i have this caddy with an intermittant no start, usually after sitting for awhile 20 minutes to overnight. cranks over fine and has spark and fuel pressure, lacks injector pulse. car will start suddenly while testing then work fine for an indefinate pe...
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1996 Cadillac Seville SLS 4.6L Excessive Emissions, No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G6KS52Y0T
Hi All Cadillac Geru's and anyone who has a idea about Northstar motors. Customer concern was low oil light coming on and Stop Engine Light Now, coming on. Also had Check Engine Light on. After looking at oil filter adapter several times, felt take out plug on... Trouble codes: P0307 (Cylinder 7 Misfire), P0741 (Torque converter clutch off), P1377 (Timing error), P1406 (EGR error)
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1996 Chevrolet S10 2.2L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1GTCS1947T
I got this 96 S-10 with 2.2L that labors badly when accelerating. Only code that set is P0172 fuel system rich bank 1. Oxygen sensors have both been replaced (no change). Doesn't have Maf. Removed the exhaust from in front of the catalytic converter. Still had... Trouble codes: P0172 (fuel system rich bank 1)
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1996 Chevrolet Monte Carlo Z34 3.4L oil VIN: 2G1WX12X5T
this engine is a sieve--replaced valve cover gaskets about 3 months ago and now leaking from oil pump drive. Mitchell say 9.1 hours AND says remove right side head. I can see the drive under the intake manifold (barely) is there something that I don't know? Do...
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1998 Chevrolet K1500 Silverado 5.7L Cuts out VIN: 1GCEK19R6W
Greetings. This 98 K1500 came in with a complaint of very low power and MIL lamp on. Went for a test drive and didn't make it 100 yards before it stalled. Found battery cables to be so loose that it wouldn't crank. Fixed/cleaned all the battery connections and...
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1999 Chevrolet Express 3500 6.5L Stall VIN: 1GBJG31F0X
Vehicle on start up without doing anything else other than turning the key, revs to what sounds like redline (non tach equipped), then stalls within 1-2 seconds. No DTC's stored and customer states it did not stall on road but rather came out one morning and s...
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2002 Chevrolet Impala LS 3.8L door locks - trunk opener VIN: 2G1WF52E42
Have a 2002 impala coming in on Friday. Looking for some pre-help. The car has been at a repair shop where they have replaced the BCM twice. One was from NAPA and one from GM. The complaint is that the power door locks are inop and the trunk lid won't activate...
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2003 Chevrolet S10 ZR2 4.3L transfer case VIN: WBSBG9331W
When truck is driven at speeds 60-70mph, we get a loud whining noise and a vibration coming from underneath driver side floor panel. when slowing down to about 35 mph you here a lound clunk or bang. there is no flashing of 4wd light. any one have any ideas on ...
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2004 Chevrolet Tahoe Z71 5.3L t-case VIN: 1GNEK13T64
We have this 04 tahoe with a 4wd problem. The customer says that the 4wd engages and works fine. The problem occurs when he tries to take the vehicle out of 4wd. Sometimes it will come out of 4wd, other times it stays stuck in 4wd. He says that if he presses t...
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2006 Chevrolet Aveo LS 1.6L MIL Lamp on, refueling problem VIN: KL1TD66656
Customer came in with vehicle with complaint of refuleing problem with vehicle, MIL has been on a year now, BUT this refueling issue has only been within the last month. He said he the light was on then he unplugged and reconnected the TPS and the light was ou... Trouble codes: P0446
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1993 GMC C3500 Sierra 6.5L knock VIN: 1GTHC33F4P
Hello Diesel Tech's. I'm looking for some advice. I'm on my second motor for this truck in 500 miles. the original motor lost compression on one cylinder. Replaced the motor and it started using antifreeze within 500 miles. Found it was mixing in the oil also ...
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2006 Pontiac G6 3.5L Mechanical VIN: 1G2ZG55826
Hello, I'm trying to decide if I need to pull this trans. The transaxle drives and works normally. It makes a noise that is road speed, and does not follow engine rpm. With a stethoscope on the oil pan it is the loudest where the filter goes into the case. Fro...
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1999 Saturn SL2 1.9L Poor Idle Quality, Cuts out VIN: 1G8ZK5279X
This vehicle will intermittently start and stumble, feels like ignition cutout, can't accel until revving engine high enough, after the one bad start, will run great all day. Coils were shorting, plugs were worn, replaced crank sensor and tried a module, check... Trouble codes: P0341, P1620, P0340, P0731, P1599
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Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac Eldorado 4.6L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1G6EL12Y9R
Thank you all who replied! We had other repairs to complete on this vehicle and I just returned back to work after surgery. Out of frustration I reinstalled the old idle air control and went through the relearn one more time and it worked correctly. We gave th... Trouble codes: P0080.
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1968 Chevrolet C10 Pickup 4.1L gas gauge VIN: CS148J1549
Hi everyone that helped. Joe asked if there was enough gas in the tank and Bill suggested attaching a string to the float arm. That got me to thinking again(thinking is something this group gets us to do) and after moving the float arm while in the tank and se...
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1991 Chevrolet K1500 Silverado 5.7L convertor clutch VIN: 2GCEK19K0M
A big Thanks to all that offered help to this older truck, I tried a new computer and that also didn't help,tcc still was not being commanded on by computer. I followed advice from other techs and jumpered the 4th switch which grounds in 4th gear to the tcc s...
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1994 Chevrolet K2500 5.7L Hesitation, Cuts out, Misfire VIN: 1GCFK24K38
Thanks for all the replies exhaust pressure was 1/2 psi idle 2 psi on the chip.egr was already unplugged and tryed. Fuel pressure was 5 psi,bingo replaced pump.tank and hanger /sender runs fine now .Vacumn is still alittle low but the owners said its runnin...
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1995 Chevrolet K3500 5.7L Speedometer VIN: 1GCHK34K4S
The customer had replaced the vss with a used one. It had a low voltage output in the ac milivolt range. After getting the GM spec of ac voltage needed. We was able to determine that the used sensor was faulty. We replaced the vss with a new one and the system...
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2000 Chevrolet S10 2.2L Excessive Emissions VIN: 1GCCS1947Y
Hello and tank you every body who responded to my help request, the solution to my high nox was to de carbon air induction, once we finish the cleaning procedure, drove the truck fo a few miles, re tested emissions, my nox dropped to 439 ppm at 15 mph and 311 ...
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1999 GMC Savana 3500 6.5L No Start VIN: 1GBHG31F9X
Truck is now fixed, woo hoo. I got a lot of replies saying to ck for power @ pink wire, I did that and it was ok. I got my hands on GM's crank no start troubleshooting guide. I followed it to a t. I then condemed the new pump, I talk to the selling dealer and... Trouble codes: 251A.
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1995 Oldsmobile Silhouette 3.8L Cuts out, Stall, MIL Lamp on VIN: 1GHDU06L2S
OK everyone this is fixed. Thanks for all the help but I guess this is what I get for getting my helper to check all the fuses for me. Barrowed a tech 2 from a friend and found that I no power to the evap purge solenoid which was why it kept setting the quad d... Trouble codes: P1640 (qdm 1 failure), P1670 (qdm 4 failurre), P1406 (egr pintle position circuit).
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2000 Saturn LS1 2.2L Poor Idle Quality, Hesitation VIN: 1G8JU52F0Y
This vehicle is still at large with same problem at this time, tech suggestions were as follows, check firing order to correspond to proper position as a reverse on 1 and 4 will affect compputer reading position of number one cyl if waste spark seen instead of...
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