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Heater O2 drive cycle requirements?
Ok, this post is on a 98 Trail Blazer, but I'm seeing issues on multiple GM vehicles, 2 at this time including a 2000 P/U, others in the past. Vehicles come in with O2 heater issues, leave with new sensors and refuse to run the O2 Heater OBDII monitor in any t... Login to read more. 
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| Engine | 4.3 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1998 Chevrolet Blazer 4.3L
| Engine | 4.3 L |
| Trans | 4-speed Automatic (Electronic) |
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