Having problems with your 2004 GMC Safari ?

Codes 141 155 171 174

\015 I drove 500 miles after i changed my fuel pump,got codes 171 174.I changed all 3 oxygen sensors,codes came back.I took it Chevy dealer they said it needed a tune up.I replaced the spark plugs,wires,dist.cap,and roter. still get codes 171 174 and now I get 141 ,155.\015 Posted / edited by AnonymousUser on : 18-01-2021

Answers :

Repair Help & Product Troubleshooting for 2004 GMC Safari

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