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Prev Professional Automotive Repair Technical Discussions for August 26, 2010
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Open Help Requests for GM
Help Request Answers
2004 Cadillac Escalade 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GYEK63N74
Customer came in with check engine light on check codes code p0300 and p0420. Check misfire data #2 cylinder had multiple misfires counts 829. some on other cylinders too but number 2 the worst. Check plugs and wires they had been changed. Check fuel pressure ... Trouble codes: P0300, P0420
2004 Cadillac DeVille 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KD54Y44
OK so SES light is on & off sporadically for past couple of weeks. Strangely enough it passed Maryland State Emissions Testing just a few weeks ago. I do not have a Gas analyzer sorry for that, I know it would be helpful to know what the gases are doing. (any ... Trouble codes: P0171, P0174, P1372
2000 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1Y
This van came to us with a rough idle and MIL on. Misfire counters showed cyls. 3 & 5 (Bank 1)at idle. Misfires stop at 1500 rpm. Misfire counters go to zero.(See repair and test history). Misfire still present after CSFI Unit and other repairs. Valve springs,... Trouble codes: P0300 (Random Misfire)
2000 Chevrolet Tracker 2.0L pedal VIN: 2CNBJ13C7Y
I have a tracker that blew a rear brake line.I repaired the line and replaced the rear cyl and shoes and front rotors and pads.Bleed all the brakes several times and still cant get a good pedal.I plugged off all the ports to the master cyl. and had great pedal...
2000 Chevrolet Silverado 1500 5.3L front end VIN: 2GCEC19T8Y
Thanks in advance for any help when we lifted this truck did a visual all looks good accept the r.f. Wheel bearing. Let the truck back down we jouce the truck no noise we drove it and it sounds the loadest when we go over a speed bumb sound like the coil sping...
2001 Chevrolet Silverado 1500 LS 4.8L Evaporator VIN: 2GCEC19VO1
Blows cold 45 degreez for fist 15 to 20 minuts then starts to get colder and goes down to 10 degreez and starts blowing mist out around 30 degreez and then u can hear the fan blowing but its like the vents are resticted and air quets coming out . Can cut ac of...
2003 Chevrolet C5500 Kodiak C5C042 6.6L right steering knuckle VIN: 1GBE5F1103
Hello everyone.I am in need of some help.I am looking for a used right front steering knuckle for a 2003 C5500.The wheel bearings went and destroyed the spindle.A new one is very expensive and can't find a used one in my area.Does anyone know where I could fin...
2005 Chevrolet Silverado 3500 6.6L Hesitation VIN: 1GBJC39245
Thanks to all who are reading this! This vehicle is a 2005 Chevrolet Silverado C3500HD cab & chassis utility body service vehicle for a petroleum & lift contractor. It is chronicly overloaded to 14,000 lbs+ but usually drives OK. Our shop has been maintaining ... Trouble codes: P1093 (Fuel pressure low during power enrichment)
2005 Chevrolet Malibu LS 3.5L starter VIN: 1G1ZT54825
We have a 2005 Chevrolet Malibu that once in a while will crank but will not start. It might happen once might happen twice. Customer is afraid it will leave her stranded. Any input is greatly appreciated.
2007 Chevrolet Silverado 3500 HD LT 6.6L cleaning VIN: 1KR09KDFO9
customer was cruising from idaho back to washington he said he lost power and called i told him probly a dirty fuel filter. he kept it under 55 mph and that got him home wen t to dealer because they just replaced his injectors about 1 year ago. they confirmed ...
1996 GMC C1500 Sierra SL 5.0L Poor Idle Quality, Misfire VIN: 1GTEC14M1T
the truck came to me running severely rough and the oil was mixed with coolant (was a couple inches over full on dipstick.passed compression test. replaced head gaskets and intake gaskets.properly adjusted lifter preload.followed proceedure for distributor ins... Trouble codes: P1345
2007 GMC Sierra 2500 HD Classic SL 6.0L Cuts out, Stall VIN: 1GTHC29U67
This truck dies intermittently, doens't matter cold or hot. While looking at misfire data all cylinders will have 1 - 6 misfires. But not all at the same time. While monitoring misfires, I may see 1,4,7 & 8 misfire, but the next time it might be completely dif... Trouble codes: P0452
2007 GMC Acadia SLT 3.6L Hesitation, Surge VIN: 1GKEV33777
Thanks in advance for your time. I need some help! I have and acadia that was recentley in for timing chain repairs. Another guy got this job and we split it since I had just atteneded engine mechanical and had freshly timmed a 3.6.The job went smooth (or so I... Trouble codes: 300 (testing and results)
1993 Pontiac Bonneville SSE 3.8L ect. VIN: 1G2HZ52LXP
Hey guys I've got a crazy one here. This 1993 pontiac Bonniville has a shake from 65-80 mph that rattles the dash/ steering wheel/ seats. The customer brought the vehicle to me after replacing the tires (having them balanced/ rotated a few times) change. ...
1999 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP12K7X
Help! cant seem to get a handle on this one.The code comes back every-time you maintain a speed of 40 to 45 mph as the freeze frame data shows PO 1133 RPM 1822 PO O133 RPM 14 . ECT 174 ECT 199 MAF 16.75 MAF 15.07 LOAD 9% LOAD 9% TP ANGLE 6% TP ANGLE 6% BA... Trouble codes: P0133 (Insuficient cross counts), P1133
2006 Pontiac G6 2.4L MIL Lamp on VIN: 1G2ZF55B06
PO106 map sets hot and on acceration. 4.9 volts reference , 10kpa unpluged,110 kpa jumped. 05ohms low reference to ground. tryed 2 delco map ,new delco mass air, known good 2 vvt solenoid, intake indution and cleaned map port,throttle plate, change oil,filter ... Trouble codes: P0106

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Reatta 3.8L door locks VIN: 1G4EC11C9K
Thanks to all that replied especially Thomas. We have e-mailed back and forth several times. Think we got it figured out. Didn't find for sure where the wire problem is, but did find that anti-theft module was not getting disarm signal from keyless entry modu...
1992 Buick Riviera Luxury 3.8L MIL Lamp on VIN: 1G4EZ13L9N
The magnet is still in the cam gear but it is very week and also the plastic is starting to come apart. I compaired strength of magnet with one in cam gear to a new one. New one was much stronger. Magnet repaired vehicle. Trouble codes: 41 (Cam Sensor Circuit).
2000 Buick LeSabre Custom 3.8L Rh Heat/Cool VIN: 1G4HR54K4Y
Replaced 2 actuators, 1 doa, other extremely sluggish, stopped several times during its travel. One door was quite stiff, lubed it up, seemed ok. Tahnks for the help. The customer got everything up to the firewall dusted !!! IATN is gr8 !!
1994 Chevrolet K2500 5.7L Poor Idle Quality VIN: 2GCFK29K4R
all seems good with vehicle. at this time no cust. complaints.. so we'll just leave it at fixed and hope this dist. assy. hangs in for a while.. thanx...
1995 Chevrolet Corsica 3.1L 1-2 Shift VIN: 1G1LD55MXS
Thanks Jerry! A new modulator valve fixed the problem. I guess the old one was just a bit stiff. The diaphram wasn't blown, but it did seem hard to move with a hand held vacuum pump. There was also a small vacuum filter in-line at the modulator. I believe that...
2000 Chevrolet Express 3500 7.4L Axle Seal VIN: 1GBJG31J8Y
Hey guys, Thank you for your help with the axle seal leak. I took Gordans advice and got the sleave/ seal kit from NAPA and when I installed it I found that the outside of the seal looked like it was leaking. I installed the kit and put RTV around the outsi...
2004 Chevrolet Silverado 2500 HD 6.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCHK23204
thanks to all who responded to my request. after much testing and inspection i found no broken, split, chaffed or bear wires. i did find posts on all data and direct hit-napa that simply stated that if you recive my code with no others then fault lies in the f... Trouble codes: P2149.
2007 Chevrolet Silverado 2500 HD LTZ 6.0L heated seats VIN: 1GCHK23U9F
thanks for the help. after inspecting door panel wiring and removal of lower seat. isolated fault to drivers door module per flow chart. thanks iatn.
2010 Chevrolet IMPALA 3.5L Sdm VIN: 2G1WB5EN9A
This one is on its way to being fixed. As Bob from Ontario stated the 2010 Impala also has pretensioners mounted in the seats. The customer who repaired the vehicle did not replace them explaining the two codes for open circuits. Thanks IATN!! The parts needed...
2008 GMC Envoy SLT 4.2L Ignition VIN: 1GKDS13SX8
It was no big deal. I simply unbolted the ign. cylinder housing from the column. The repair instructions say to remove the cylinder before removing the housing or the electrical portion of the switch. This is not necessary. The dealer had the housing in stock ...
1997 Oldsmobile LSS 3.8L Misfire VIN: 1G3HY52K0V
Thank You all for the help, I ended up doing a crank relearn, Fixed the problem, Vehicle passed smog, all monitors complete, Note: The Cat was changed due to high Nox, Thank you all again, Trouble codes: P0300.
1996 Saturn SL2 1.9L No Start, Stall, Misfire VIN: 1G8ZJ5270T
Well thanks to all who replied. Problem was actually multiple issues. The biggest problem was the plug wire to coil connections found by testing the resistence with the wires on the coils, ohm meter showed and open but the connection felt tight, squeezed termi... Trouble codes: P1599 (Stalled), P0300 (Misfire).
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