Last post on May 17, 2013 at 2:26 PM
You are in the Chevrolet Colorado and GMC Canyon
What is this discussion about?
Chevrolet Colorado, GMC Canyon, Engine, Truck
#629 of 704 Re: no-start phantom phenomenon [stshimon]
Feb 06, 2012 (5:54 pm)
I seem to be having the same issue with my '04 Canyon (2.8 4 cyl) as I am coming up on 85,000 miles. Some mornings it won't start, just starter grinds and grinds; I give up and take the other car. This morning truck did start, at lunch time did start to let me leave parking garage, 15 min later would NOT start after I had picked up lunch. Called AAA for tow, tried one last time 5 min after non-start and it DID fire up this time, took to dealership anyway. I had never got any amber check engine lights/codes.
They could not replicate problem, fuel pump pressure was good, fuel filter dirty enough to warrant changing. In all their fiddlin with it they got one code once (did they say crank sensor?). They took off an intake hose and shined light in to TBI and showed me carbon build-up at top, and while not claiming that was the root of problem, are recommending fuel injection system cleaning for a couple hundred bucks and I will probably authorize that. Someone online here mentioned AC connection to all this ... I do believe mine was off the first two times today when it stared, and that I had turned it on at mid-day before it did not start. This is where I am at this point.
#631 of 704 Been trying to get an estimate of repair coats
Feb 17, 2012 (8:22 am)
I'm new to this forum. My wife and I am retired so we don't have money to throw away. I went to a Chevy dealer to get an estimate for repairs on my 2006 Chevy Colorado 32,426 miles. I told them my check engine light was on. I also had it read at an auto parts store the Error codes were P0785 and P2610. They told me that I would have to pay $96.50 to have it checked out and had no idea what the problems were. It doesn't seem fair that since the truck has a module on it to tell what the problem is that I would have to spend $96.50 to get an estimate when the trouble codes are there. Seems like a rip-off to me just to get an estimate.
#632 of 704 Re: Been trying to get an estimate of repair coats [timg47]
by Mr_Shiftright HOST
Feb 17, 2012 (10:39 am)
Well I understand how annoying this is, but in fact the trouble codes don't tell you which part is defective. No car computer can do that (yet). The trouble codes only tell us which system or circuit is in distress. So if say your trouble code was related to an 02 sensor, this doesn't mean the 02 sensor is bad...it just means something is making the 02 sensor read outside its normal range. Could be the 02 sensor, could be a bad fuel injector, could be a bad catalytic converter, could be a bad ignition coil.
So while I do agree with you that they shouldn't charge you $100 bucks just to READ the code, if they are charging you $100 to diagnose the actual problem--such as testing the 02 sensor, etc) and isolate the actual defective component, then that's fair enough.
#633 of 704 Re: Been trying to get an estimate of repair coats [timg47]
Feb 18, 2012 (8:17 pm)
Make sure that your gas cap fits tight.
#634 of 704 Re: 2004 GMC Canyon 4x4 "Reduced Power" setting code P0601 [37raiderfan11]
Feb 19, 2012 (7:50 pm)
I have not taken the truck to a dealer yet, San Diego County is outrageous with $108.00/hr for labor. I replaced the factory battery today; drove for 20 minutes straight with no check engine ligth or reduced power. I have not had any codes stored like the last time. Last code stored was P0606/ PCM. Has this fixed the reduced power? I dont have $1000 for a dealership to fix this.
San Diego GM dealership:
PCM: $410.00 , core $75.00
Labor for R&R of PCM: 1.5 hrs at $108.00/hr
and of course tax at 7.75%
#635 of 704 Re: 05 colorado reduced power mode curse [ridinbaseline]
Feb 23, 2012 (9:09 pm)
HI I HAVE A 2006 CANYON 4X4 4DOOR AND IT HAD THE SAME PROBLEM..SO I REPLACED THE BLOWER RESISTOR BUT SAME PROBLEM.. IT IS THE WIRING HARNESS THAT GOES TO THE RESISTOR THAT IS THE PROBLEM REPLACED IT NO MORE PROBLEMS.........
#636 of 704 Re: 05 colorado reduced power mode curse [kaianui8]
Feb 24, 2012 (8:25 am)
We're glad to hear you found a fix for your vehicle! Hopefully this issue is cleared up for you for a while!
If we can ever be of assistance, don't hesitate to get in touch via email.
GM Customer Service
#637 of 704 Re: Been trying to get an estimate of repair coats [timg47]
Feb 24, 2012 (11:15 pm)
As an old Wrench since the 60's I can tell you why the dealer charges for this. Many people for decades would get a "Free" estimate of repairs then fix it themselves.
The "C" note they're charging is the 1-Hr[or whatever] minimum time.
The code P0785 is pointing at a "Shift/Timing Solenoid Malfunction"
The code PO2610 is One digit too many for the OBD-II system, you did a typo, or the dude gave you the wrong code
The code PO261 says the "1 Cylinder I Injector Circuit Low"
As said previously, WHY these codes are showing up is a matter for a trained technician, a GM Service Manual and a Quality Scan Machine.
Several Non-Obvious issues many mechanics miss.
I coined "Invisible Corrosion" a condition where the connector male and female terminals ARE tight yet fail to conduct. Sometimes a Lacquer or Varnish like Clear coating will form, preventing flow of electricity.
The previous condition is often caused by so called "clean-up-shops" spraying that clear junk all over the engine in an attempt to make it look new, inadvertently making a mess of the electrical system.
Poor "Mechanical Joint" in the plug, some techs overlook this issue which is VERY prevalent on Fuel Pump wiring harnesses on most GM's
Poor Grounding. Many electrical faults are due to faulty grounds.
#1 - Rust or Corrosion from Battery Acid Vapors.
I separate the 2 because Battery Vapors cause corrosion in some unusual places, not just under the battery.
#2 - Paint under the lug, Even the factory will place grounds on painted areas, and especially Body Shops after wreck repair.
#3- Poorly Crimped Lugs,
GM introduced copper coated "Aluminum" battery cables with a 2-ear lug, instead of the "barrel lug" These were notorious for sounding like a bad battery or bad starter on very Hot days.
Other lugs are crimped with NO grease, soon to corrode, thanks to all the Big-3 for these issues.
Insulation breaks in the wires.
The voltages in modern sensors go as low as 1.5 VDC,
[ that is AFAIK per my newest GM Service Manual]
A tiny crack or cut in the insulation can allow water intrusion, then Corrosion builds up on the wire, SIGHT UNSEEN.
As a near 40yr Electrical Generation Employee, the rule of thumb is that electricity flows on the OUTSIDE of the wire, not the inside.
I found this while working on a 91 Roadmaster S/W.
The ATS sensor [Air Temp Sensor] showed bad. The car would suddenly lose power at Interstate Speeds, nearly die, then chuuggg along, barely running.
I replaced the ATS, which in that 305 TBS system, is in the air cleaner.
NO Good, same issue.
Checked the wirings' mechanical fit, checked for the proper voltage and ground away from the plug, all Good ?? [Scratching Head]
The issue was sporadic, which of course made it harder.
A close inspection of the wires revealed that someone had closed the breather lid on one of them. At that point was a minute crack in the insulation.
Peeling off the insulation showed GREEN corrosion. The wire was SOLID AND INTACT, the mere presence of corrosion caused this fault.
I cut out 2" of the wire, used Heat Shrink and 5% Silver Solder and all was well.
Once a car with 4-Headlights had all 4 beams Lit Up on Low beam yet very very Dim?
Checked fuse with VOM Meter, Fuse showed Good.
The final solution, in that time cars had round fuses, the fuse was cracked below the metal contact area.a tug on the fuse, and it fell apart!
New fuse, all Good!
[This situation is called "Back-Feed, something most guys who pull trailers with NO Ground wire find out quickly]
All the previous drivel was my attempt to show how even the OBD-II vehicles and modern scan tools do not make wrenching Easy!
aka Rusty Wrench
PS, here's a link to OBD-II Codes
Checking the TSB's [Technical Service Bulletins] I see nothing there related to your current issue.
Note, these TSB's are only partial and incomplete, you must purchase an Alldata or other subscription to view them in complete form.
Also, not all vehicles will exhibit the symptoms listed.
I did find One Recall which your vehicle should have gotten notice.
Bulletin No: SB-09186
Date of Bulletin: 02/25/2011
CHEVROLET\GMC SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SPECIAL COVERAGE ADJUSTMENT-BRAKE LAMPS INOPERATIVE OR CONTINUOUS ILLUMINATION. THIS MAY BE CAUSED BY CONTAMINATION IN THE BRAKE LAMP SWITCH.
Good Luck and take a $3 sack of Apples for bribery and be nice, it will help.