BQS4

This is not really a searchable item, but, those out there who have had multiple HHRs, by that I mean, a 2.0, a 2.2 and a 2.4, I believe most of the body wiring is the same, but, my question is, what about the engine wiring, are they all basically the same?

Oldblue

I've worked on both the 2.2 and the 2.4, and there are differences like the cam position sensors on the 2.4 but not on the earlier 2.2's
I haven't had an SS in the shop yet for any engine work just struts and shocks and oil and filter, so no electrical work yet.

donbrew

Check the part numbers on gmpartsdirect?

I am guessing the 2.2 VVT and the 2.4 would be the same. 2.0 has all that extra stuff.

843de

Not only are there differences between the HHR's due to which engine is smuggled between the front fenders, but there are differences between model years.

2006's - First model year, even the block castings are different.

2007-2008 - Revised engines across the board.

2009-2011 - More revisions, Flex-Fuel capabilities, etc.

donbrew

I was talking about the engine wiring harness only. I thought that's what the OP meant.

BQS4

Don is correct, I had been having an off and on electrical gremlin with the wife's '06 2.4 2LT auto. After conferring with a GM Tech friend, and calling one more GM tech, we found the problem to be the wiring harness on the motor and where the harness was anchored to various places on the motor. These spots were actually wearing through the insulation and wreaking havoc on the computer (ECM/ECU/PCM) After recovering the worn area, and further protection from rubbing, the problem was solved. I wanted to point this out so as to be able to help future owners prevent and or fix this problem. I can post pictures as to where to look, just needed to know if the harness is the same for all the motors.

Oldblue

The harnesses may not be identical , but the mounting points would almost be!
So please post those pictures!
And by the way, thank you for taking the time to share this info.

donbrew

Seems to me I recall a TSB about wire chafing under the hood.

hhr06NJ

I remember seeing that bulletin too....
pictures would be GREAT!

Lucky

Sorry I'm late to the party. I think you guys are talking about this.

Pip4549A
#PIP4549A: Various Intermittent DTCs Or Electrical / Communication Concerns - keywords bare battery bracket CEL chaff circuit class2 connection controls crank data DTC ECM engine ground harness high intermittent - (Jan 5, 2009)


Subject: Various Intermittent DTC's or Electrical/Communication Concerns


Models: 2005-2009 Chevrolet Cobalt SS

2005-2009 Chevrolet Cobalt

2006-2009 Chevrolet HHR

2008-2009 Chevrolet HHR SS

2008-2009 Chevrolet Malibu

2007-2009 Pontiac G5

2008-2009 Pontiac G6

2005-2009 Pontiac Pursuit (Canada Only)

2007-2009 Saturn Aura

2005-2007 Saturn Ion

2004-2007 Saturn Ion Redline

2002-2009 Saturn Vue

With any of the following ECOTEC engines:

2.0L Engine (RPO LSJ/LNF)

2.2L Engine (RPO L61/LAP)

2.4L Engine (RPO LE5/LE9/LAT)
--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
A technician may comment of intermittent CEL, DTC's or No communication with various modules. This may be caused by a short to ground of the vehicle wiring in the engine harness.


Recommendation/Instructions:
The harness may chaff in the area of the Canister Purge Solenoid attachment bracket, causing an intermittent shorting to ground. The harness routing forces the harness into the edge of the bracket. This bracket is present with any Ecotec engine. The Purge Solenoid bracket may have a sharp edge from the manufacturing/shearing operation. If any DTCs are setting consistently, perform the eSI diagnostics and repair as necessary. If the eSI diagnostics do not isolate the concern, inspect the engine harness for potential shorts to ground at the EVAP purge valve bracket on the side of the cylinder head. Then repair and reposition the circuits/harness as necessary.

Note: To prevent future chaffing remove the sharp edge from the purge solenoid bracket and add conduit to the engine harness at the ECM and Purge Solenoid harness breakout.



This PI applies to all DTCs Listed below:

P0326 P0335 P060E P0561 P0651 P2120 P2122 P2123 P2125 P2127 P2128 P2135 P2138 U1863 U1886 U1899 U2105 U2106 U2107 U2143