The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Two ECT Sensors LS1 Where is the other one?

eagleuh1 · 02-06-2010, 07:33 PM

Was this harness modified already. Perhaps they added wiring for a guage sender that some people put in the passenger side head at the back side. There is an allen head plug normally there. It will be below the heater blower/AC box. This is how I set up my 5.3 to supply the temp guage. The driver side sensor supplies the PCM with ECT signal.I can't recall what sender I used on passenger side, but believe it was 99 Fbody. Good luck. What color is the extra wire that you have? Pic of connector would be good.

02-06-2010, 07:33 PM	#6
eagleuh1 Registered User Join Date: Jul 2009 Location: Russellville, Arkansas Posts: 1,699	Re: Two ECT Sensors LS1 Where is the other one? Was this harness modified already. Perhaps they added wiring for a guage sender that some people put in the passenger side head at the back side. There is an allen head plug normally there. It will be below the heater blower/AC box. This is how I set up my 5.3 to supply the temp guage. The driver side sensor supplies the PCM with ECT signal.I can't recall what sender I used on passenger side, but believe it was 99 Fbody. Good luck. What color is the extra wire that you have? Pic of connector would be good.