Last post on Apr 30, 2012 at 7:10 PM
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Chevrolet TrailBlazer, GMC Envoy, Buick Rainier, GMC Envoy XL, Isuzu Ascender, Oldsmobile Bravada, SUV
#9524 of 18329 re: No Heat to the feet
Jan 07, 2003 (3:46 am)
I have an appt set up for next week for this issue (as well as 3 others). I have turned the temp up to 90 and changed the various mode positions, but no air at all will come out below.
The TSB I saw had a brief description of software upgrade to fix:
02-01-39-005; HVAC System Inoperative for a Drive Cycle, Poor HVAC System Performance in High Ambient Temperatures (Update HVAC Control Module Software); 2002-03 Chevrolet TrailBlazer, EXT, GMC Envoy, XL, Oldsmobile Bravada
Mine has lated more than one drive cycle, it's as if, the baffles do not open to redirect toward the floor.
#9526 of 18329 Driver's side heat
Jan 07, 2003 (5:57 am)
Hey where did my feet(or paws) come into the discussion. I had no heat at any point on the drivers side. Changed the temp and mode comtrol. We will call the dealer today and have them look up the fixes before we bring it in. I am working on my list. We also have the seat belt too tight problem.
Thanks for the info.
#9527 of 18329 RE: Missing Glovebox Light by crispy2ski
Jan 07, 2003 (7:21 am)
If you decide to add the missing lights you will still not get the "system" the '02s have unless you figure out how to tap in to the courtesy lamp power circuit.. The BCM controls the lights and will turn them off to prevent battery run-down in case the glove box or hood are left open. Nice feature. I have included here the description of operation how the lighting sytem works.
Quote: "The BCM inadvertent power courtesy lamps supply voltage circuit provides battery positive voltage to all of the interior reading lamps, IP compartment lamp (glove box light), underhood lamp, and both visor vanity mirror lamps. In the event that any of these lamps were to remain illuminated for a period of more than 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power courtesy lamps supply voltage circuit to prevent a total battery discharge condition. Only when the ignition switch is cycled back to the RUN position will the BCM reset the internal timer and reactivate the inadvertent power courtesy lamps supply voltage circuit."
#9528 of 18329 Initial opinion & one question/problem
Jan 07, 2003 (8:05 am)
After owning my Envoy XL for about 3 weeks now I must say I am very satisfied with it. I have averaged 16.3 mpg over 3 tanks. A little lower than I would have liked but not too bad for probably 40 interstate/60 city driving.
I have had only one problem with the XL. A few days ago, the air bag light stayed on during my drive home from work. However, later on when I started the car, the light did not come on.
Has anybody had a similiar problem?? Any thoughts would be greatly appreciated.
Also, I know the manual says to wait until the "change oil" light comes on to change the oil but I was thinking about changing it sometime between now and 1,500 miles to get the break-in oil and any metal filings out of the engine. Any thoughts???
Jan 07, 2003 (9:27 am)
I'm with you on the first oil change: I had the oil changed in my TB the first time at about 1000 miles, and my gut is struggling to come to terms with letting the 'puter tell me when it thinks it's time to change the oil. I'm sure that I'm wasting money, but I still tend to subscribe to 3 months/3000 miles between oil changes. Just seems like the price of an oil change is a small price to pay when weighed against the costs associated with waiting too long, especially if you intend for this vehicle to be in your fleet after its warranty expires.
Good luck with your Envoy.
#9530 of 18329 Manual Floor Heat Control
Jan 07, 2003 (9:55 am)
I've noticed a problem over the past few weeks with the manual control of the floor heat. I start my TB and set the control on Defrost for 5+ minutes. When I turn the knob from the Defrost position (far right) to the floor heat position (top), the heat blows out of the dash vents and not the floor. I figured out a post-warranty fix of turning the knob from the far right, to the far left, and then the top. Has anyone else encountered this issue?
Jan 07, 2003 (10:06 am)
sloth501 - We've had our Envoy XL for about 2 weeks now and we're averaging around 18 mpg (4200 w/3.73 rear end). I'm pretty happy with the gas mileage given it's still breaking in. Haven't seen the air bag light come on yet. I'll probably get my oil changed between 2000 and 3000 miles.
#9533 of 18329 re: oil changes
Jan 07, 2003 (10:27 am)
I've adjusted my timelines to have my oil changed around 5500 miles which seems to be about 50% on the oil life indicator. I agree, I can't get used to waiting for the oil change indicator to tell me. Also, I've been watching my air cleaner (standard, facory install) to tell me that it needs changing. I haven't seen any level change on that indicator yet. I have 34k miles on my 2002 TB LT. May of this year will be my 2nd year of ownership.