Automotive RepairDiagnostics & Troubleshooting

2005 GMC Jimmy has persistent misfire under load on the highway (p0301/p0300) despite replacing plugs, cables, distributor, coil, MAF, injector, intake gasket, fuel pump and filter over two years.

0
Opp. Score
49
Reports
1
Severity
4High
Trend
0%
stable
First Seen
Jun 7, 2026

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