P0442 on 99 Silverado (5.3L)
01-24-2006, 12:08 PM
#11
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Originally Posted by slowec
Swap back to stock gas cap clear codes and retest. seemn this alot with locking caps. Did your prob start after the new cap? Keep us posted.
Problem existed before new gas cap....I bought new cap for theft protection AND to see if it would fix problem.
THANX anyway!
01-24-2006, 12:45 PM
#12
Originally Posted by 99z71leather
How much would a new cannister cost??....a buddy of mine that used to be a mechanic before joining the military suggested replacing that due to the mileage on the vehicle.
Have any recent repairs been done that may have caused a slight leak? Like a fuel pump or fuel sender? Maybe something just isn't completely sealed.
If you know someone with a truck like yours, you could always swap cannisters over and see if the code comes up on his/her truck...
01-24-2006, 02:01 PM
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I might find a junk yard for that part....if the doner is "young" enough.
I wish I could swap to see if the code comes back, but I have gone weeks at a time w/o the idiot light coming on and then had it come on two-three times in a week.....hit or miss still.
I wish I could swap to see if the code comes back, but I have gone weeks at a time w/o the idiot light coming on and then had it come on two-three times in a week.....hit or miss still.
01-24-2006, 04:22 PM
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Try a new none locking cap. It could still be your cap because you may have replaced a leaking cap with a locking cap that is not sealing. It is not unusual to read about locking caps that do not seal well.
01-24-2006, 04:28 PM
#15
Originally Posted by Mort
Try a new none locking cap. It could still be your cap because you may have replaced a leaking cap with a locking cap that is not sealing. It is not unusual to read about locking caps that do not seal well.
01-25-2006, 09:42 AM
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I have decided to bite the bullet and take it to the dealer so they can pressure check the system propperly....I also have a pully or bearing starting to squeal......Can't pinpoint that one.
Will post again when I have the results.
If anyone still has ideas, keep em coming!
Will post again when I have the results.
If anyone still has ideas, keep em coming!
01-27-2006, 02:18 PM
#17
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Well, $107 later (w/tran flush). The Mandal GMC dealership in D'Iberville has no reason as to why I am still getting P0442....that and they wouldn't pressure test the system like I asked.....cause they didn't have an active code was their response!
Anyone that is a REAL mechanic and has any ideas, please let me know!!
Anyone that is a REAL mechanic and has any ideas, please let me know!!
01-31-2006, 06:19 PM
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That's not a bad idea....I will have to wait until my gas tank is on fumes again. I am at about half right now, so that will be sometime this weekend if I am lucky.
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