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EGR passages clogged?
1998 Chevy Express 2500 will not set monitors for EGR, CAT & Evap.. Will not set a check engine light either. Looking at mode $06 EGR fails, valve works, engine stumbles but does not die with valve driven opened. Pretty sure passages are clogged in the int... Login to read more. 
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| VIN | 1GCGG25R0W |
| Engine | 5.7 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1998 Chevrolet Express 2500 LS 5.7L
| VIN | 1GCGG25R0W |
| Engine | 5.7 L |
| Trans | 4-speed Automatic (Electronic) |
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