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Prev Professional Automotive Repair Technical Discussions for May 8, 2012
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Open Help Requests for GM
Help Request Answers
2003 Cadillac CTS 3.2L Misfire
Got what should be an easy one for you GoodWrench guys. Got this '03 Cadillac CTS with a 3.2 that loses its pulse signal to the #3 injector. Injector has been replaced along with a used ECM. Same results. Car will have an injector pulse signal for a few minute... Trouble codes: P0303 (Cylinder 3 misfire)
2003 Cadillac CTS 3.2L lifters VIN: 1G6DM57N53
car came in with a broken timing belt. It had smacked some valves. removed heads and sent to machine shop. was told be shop that i needed to replace all lifters, that when they compressed them only 2 had a spring center after compressed. i ordered a new set fr...
2006 Cadillac STS 3.6L steering column VIN: 1G6DW67746
Customer complaint squeak in steering wheel when turning. Removed column tore down and lubed everything quiet on bench found no problems reinstalled. Sitting still or driving slow turning the wheel creats a noise like corduroy pants rubbing together. Lift vehi...
1996 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 1GCEK19R2T
I found the fuel pump relay burned as well as the fuel pump connector in tank and i mean it was really burned bad so bad in fact that the terminal almost fell out but yet it still ran. Even with this occurance the vehicle did provide fuel pressure it wasnt cor...
1998 Chevrolet Prizm 1.8L engine VIN: 1Y1SK5280W
The engine stalls as some as you turn the headlights on. Just like you shut the ignition switch off. But other wise runs OK. Also you can use the blinkers with headlight off & park lights off. But turn on the park lights and use blickers it spudders with the b...
1999 Chevrolet Blazer 4.3L Heater VIN: 1GNDT13W5X
Customer brought vehicle stating that heater was not blowing hot. and vehicle had just been in for a coolant leak in which we had found leaking manifold gasket so updated gaskets were installed. we checked and found all vacuum line attached checked heater at i...
2005 Chevrolet Trailblazer EXT LS 4.2L vehicle speed sensor
PLEASE DON'T RESPOND IF YOU DON'T READ THIS POST IN IT'S ENTIRITY. I'm to my wit's end here guys, need some suggestions. OK, my boss purchased this vehicle with a bad trans. One of our mechanics replaced the trans, and my boss sold the vehicle. The customer b...
2007 Chevrolet Tahoe LTZ 5.3L Misfire, MIL Lamp on, tick noise VIN: 1GNFK13027
Tahoe came in with a complaint of tick noise and miss- wants a tune up an 100000 mile service, is missing on cylinder #6 with an lifter ticking noise, also has service stabilitrac and traction control lights on. Noticed bullitens on replaceing lifters and DOD ... Trouble codes: P0300
2007 Chevrolet Equinox LS 3.4L Shift solenoid a VIN: 2CNDL13F27
Code PO973 Shift solenoid A ( or 1 ) low or shorted to ground. Problem is intermitten when warm defaults to 5th gear. Tcm is prindle switch. Anyone have history with this code. Trying to find pin out for soleniod with tcm removed.
1995 GMC Jimmy SL 4.3L distributor (cap&rotor) VIN: 1GKDT13W1S
I have a 1995 production date 03/95 GMC Jimmy SLT. With 226715 kms with VCM service number [...]-BABB the vechile has no trouble codes present curently or in previous history. The tack signal is 210 to 250 RPM cranking, there is plenty of spark from the coi...
2000 GMC Sierra 1500 SL 5.3L Oil Level Light VIN: 1GTEK19T3Y
Oil level light on and won't go out. Recently replaced oil level switch because it was leaking oil and the light wasn't on at that time. Checked oil level and thats full. Tried unpluging it and no change. Tried bypassing the switch by jumping the two wires tog...
2003 GMC Savana 1500 5.3L Poor Idle Quality, Stall
Posting a fix, and information. I had a 2003 Savana conversion van with a 5.3 come into the shop with idle issues hot. Vehicle stalled intermittently, scan data showed idle motor adjustment. After cleaning the TB, idle improved some, still [...] occasionally, wi... Trouble codes: P0506
2004 GMC Sierra 1500 Denali 6.0L vent VIN: 2GTFK69U64
good morning everyone, customer came in complaint with it not blowing at all in the center vents, it will work fine on floor and defrost. is there a blend door or motor that have a problem . it is all digtal controls thanks
2007 GMC Canyon SLT 3.7L Headlights VIN: 1GTCS13E27
As noted in the repair history this fine truck is back 2k miles after replacing the BCM for no dash lights. Again has code B2624. Both times the dimming potentiometer PID on my Tech2 shows excessive voltage with headlight switch plugged in (7.4v) and unplugged...
1967 Pontiac Firebird 400 6.6L Surge, Poor Fuel Economy
looking for alittle guidance from somebody that knows ALOT about tuning a large cam pont. with an edelbrock 1406. after heat soak, it has extended crank. fuel economy is piss poor. you can adjust idle screws all the way in on front of carb without it changing ...
2008 Pontiac Grand Prix GXP 5.3L Erratic Shift VIN: 2G2WC55C48
Vehicle came in with an erratic shift. Had U0073 stored. Snap on scanner defines it as Control Module comm BUS off. When I clear the code the transmission shifts perfectly. After clearing the code it can take anywhere from 5 mins to 10 mins to set again. Also ...
2002 Saturn Vue 3.0L No Start VIN: 5GZCZ63BX2
Saturn tects, have this vue that came in shop with lean codes and engine miss. tighten air plate and clean maf for lean codes. pulled intake to inspect #5 cyl and coil. replaced all spark plugs and boots. drove car about 8 miles and miss stiil there when hot, ... Trouble codes: P1629, U2107

Fixes & Summaries for GM
Fix/Summary Answers
1999 GMC K1500 Suburban SLE 5.7L Driveshaft VIN: 3GKFK16R6X
We concluded the front differential was the problem. Since the customer did not want us to pursue a solution there, we tweaked and tuned the front drive-shaft as much as we could. The noise is perceptible only if you're really paying attention.?? It's up to th...
2000 GMC Yukon Denali 5.7L keyless entry VIN: 1GKEK13RXY
cust declined any further time. Sorry for the lack of info. Thanks to those who took time to help.
1998 Oldsmobile Intrigue GL 3.8L Misfire VIN: 1G3WS52KXW
well after going back and checking, found that the vacuum was fluctuating at idle, and there was a slight rattle. raised the rpms and the rattle was slightly louder. pulled the valve cover and listened to the rocker arm and the lifter on #5 intake is loose pos...
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