- #8 of 13
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Pressure Readout
by sparrowpi
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May 09, 2009 (6:15 am)
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My 08 Uplander has the Tire Monitor System readout and has consistantly given me either wrong info or no info. There will not be a pressure reading and it happens on all of the tires, not just one, as at first I thought it might be a bad sensor. Now, when I rotate the tires I cannot get the system to reset at all. Tried 6 times yesterday to recalibrate to no avail.
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- #9 of 13
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Re: Pressure Readout [sparrowpi]
by fscoles
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May 11, 2009 (10:12 am)
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Replying to: sparrowpi (May 09, 2009 6:15 am)
Ours is also an 08Uplander, and so far its TPMS display hasn't malfunctioned. Since yours is not working correctly and you cannot get it to reset using this procedure, if your odometer is less than 36,000miles (bumper-to-bumper GM warranty) or if you have GM-Certified-Used warranty remaining your dealer can repair it at no charge. Yesterday, I noticed that our Right-Rear (RR) and Left-Rear (LR) tire pressures read backwards on the display (not a big problem, probably they had programmed it that way last October when we purchased it used), so I used the above procedure for the first time and it worked fine. The display readouts agree with my mechanical tire gauges. On the 08 owner's manual page 5-62 there's an apparent mistake: "Activate TPMS sensor by increasing or decreasing ..pressure for 5 secs OR until a horn chirp sounds. The chirp ..may take up to 30 secs to sound." GM can't mean this literally, because it took about 18 secs for my chirp to sound, and the tire would have been flat if I had released air for that long (Duh). I released air for only 5 secs (from 35 psi down to 29psi) and then it took over another 15 secs before the chip sounded. The person who wrote the procedure had probably never done it. When finished, I checked each tire that the display reported the positions correctly. Page 5-61 5. says "..The driver side turn signal lamp comes on." but I didn't see any lamps turn on.
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- #10 of 13
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Re: Pressure Readout [fscoles]
by 442dude
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May 11, 2009 (5:48 pm)
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Replying to: fscoles (May 11, 2009 10:12 am)
You're right - I don't remember the turn signal lamps coming on either - I just went by the horn chirp...mine only took a few seconds after the 5 seconds of letting air out though.
I enjoy it when I find mistakes in the owner's manual because there are plenty of them in there - not just for the Uplander but for all the cars I've ever owned. Some owner's manuals are better than others. Some are just downright bad...I think the manual for my VUE is one of the most incorrect I've ever seen, mistakes all over the place. The best is the procedure to change the cabin air filter. The manual says that you have to disassemble the glove box and take out a bunch of stuff to get to it. In actuality its under the hood underneath a cover that has 5 or 6 easily removed clips holding it in. I'm glad I didn't take the glove box apart before I figured that one out. Go figure......
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- #11 of 13
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Re: Pressure Readout [442dude]
by fscoles
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May 12, 2009 (2:11 pm)
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Replying to: 442dude (May 11, 2009 5:48 pm)
As for mistakes in manuals, the '95-96 Windstar Haynes aftermarket manual said to replace the rear bank spark plugs to first lower the engine for access, but simply removing the air filter parts (took only several extra minutes) gave access to the rear bank. I'm hoping to find an equally easy way with our '08 Uplander, because unbolting the top two engine supports and rocking the engine forward (suggested on this and other Uplander forums) sounds dangerous.
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- #12 of 13
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Re: Pressure Readout [fscoles]
by williamyoung
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May 12, 2009 (4:07 pm)
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Replying to: fscoles (May 12, 2009 2:11 pm)
OH MY GOSH . . Is that right? 
I looked at the front three that are SO easy to get at but have never removed that big black plastic cover to check the back ones.
Hard to believe the motor would have to be tipped forward to replace the other three. 
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- #13 of 13
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Re: Pressure Readout [fscoles]
by 442dude
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May 13, 2009 (5:54 pm)
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Replying to: fscoles (May 12, 2009 2:11 pm)
I haven't done our Uplander but I had to rock the motor forward on our Venture to replace the alternator. It actually sounds worse than it is. Its not a big deal. The key is to have a good ratcheting strap to pull it forward once everything is loosened up. Its kind of cool...the motor really doesn't move all that much (maybe 6 inches) but its just enough to let you get to what you're working on. I never would have gotten the alternator out of the Venture any other way without moving the motor as it was kind of like a puzzle even with the motor rotated forward. You had to drop it and turn it just right to get it squeeze through the small spot you had to work with.
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