Jump to content
  • 0

PO 171/174 on 2003 5.3 Silverado AGAIN





I have had replaced by dealer since November 2011 through last week:


Plugs and wires

Fuel Filter


Fuel Pump X 2 yes twice

Fuel Control Mod

Air Filter

Intake Gaskets

Injector O Rings

3 out of 4 of the 02 sensors

I have had the alternator and battery checked thinking it may be a low voltage issue


Upon getting my truck back last week having installed the Fuel Pressure Reg, the light came on within 30 miles. I called the dealer and they now want to replace injector rails because it "may" have issues. I have $1800.00 in this and am fed up.


Any ideas?




[email protected]

Link to comment
Share on other sites

5 answers to this question

Recommended Posts



I disconnected the MAF plug and drove it for 50 miles. My truck would die under 15mph. It threw codes 102 (MAF) and 171/174 lean bank 1&2. Here is what was unusual, I plug the MAF back up and within 2 miles all codes go away and truck runs better. Still seems to be missing a bit and the idle is a bit off, fuel economy is terrible but now I am thinking injectors. Is there a way to test for the injector performance?

Link to comment
Share on other sites

First suggestion would be to find another dealer ... or call corporate on this one ....

Link to comment
Share on other sites

lean Bank 1 and Bank 2 are the only codes.


And yes I will find another dealer. About 20 35 miles to next dealer.


I disconnected the vac line on brake booster. Truck dies almost instantly. I am at a loss.

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.