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2002 Suburban 5.3 'Z' engine, P0171, P0174
Subject vehicle is a "flex-fuel" Z code 5.3L, continues to set both p0171 and p0174 codes. History of these codes very intermittent, recently becoming persistent. Related and un-related work done... B1S1 O2 sensor replaced due to failed heater... fuel pressure... Login to read more. 
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21 Replies Received
21 Replies Received
| Engine | 5.3 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
2002 Chevrolet Suburban 1500 LS 5.3L
| Engine | 5.3 L |
| Trans | 4-speed Automatic (Electronic) |
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