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P0307 cylinder seven misfire?
1999 GMC SIERRA
200,000 MILES • AUTOMATIC
HLENORI
MEMBER
3 POSTS
FOLLOW
Replaced spark, plug and spark plug wire replaced coil and injector and PCV valve
May 5, 2026 at 3:08 PM
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HLENORI
MEMBER
3 POSTS
Also did compression check all cylinders about 120
Images (Click to enlarge)
May 5, 2026 at 4:27 PM