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Home
GMC
Sierra
Trouble Codes
P Codes (Powertrain)
P0400 - P0499
P0420
GMC SIERRA P CODES (POWERTRAIN) P0400 - P0499 P0420
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Found 1 result
1999 GMC Sierra Diag Code P0420
I Used My Programmer To Get Code P0420 And So I Took It To A Midas To Have Them Take A Look. The Guy Told Me That I Needed To Replace My...
Asked by
skelix912
·
1 ANSWER
1999
GMC SIERRA
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