LY7 MIL/DTCs P0016, P0017, P0018 or P0019 - Stretched Primary Drive and Both Secondary Drive Timing Chains (Replace Primary Drive and Both Secondary Drive Timing Chains)
| Subject: | LY7 MIL/DTCs P0016, P0017, P0018 or P0019 - Stretched Primary Drive and Both Secondary Drive Timing Chains (Replace Primary Drive and Both Secondary Drive Timing Chains) |
| Models: | 2007 GMC Acadia |
| 2007 Pontiac G6 |
| 2007 Saturn AURA, OUTLOOK |
| with 3.6L HFV6 Engine (VIN 7 -- RPO LY7) |
Condition
Some customers may comment on the Malfunction Indicator Lamp (MIL) being illuminated. Technicians may find the following Diagnostic Trouble Codes (DTC) stored:
| • | DTC P0016: Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation Bank 1 |
| • | DTC P0017: Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation Bank 1 |
| • | DTC P0018: Crankshaft Position (CKP) - Intake Camshaft Position (CMP) Correlation Bank 2 |
| • | DTC P0019: Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation Bank 2 |
Cause
The cause may be a stretched primary drive and both secondary drive timing chains.
Correction
Refer to SI for the following diagnostic information if only one of the following DTCs are set:
| • | P0016 |
| • | P0017 |
| • | P0018 |
| • | P0019 |
If there are more than one of the above mentioned DTCs set, inspect the timing chains for being stretched. Refer to Camshaft Timing Drive Components Cleaning and Inspection (Fourth Design) in SI.
Important: For demonstration purposes - The 3rd design chain (1) was never used in the models mentioned in this bulletin.
The above illustration shows the 3rd design roller type chain (1) (for model years 2005-2006 - LY7) and the 4th design link type chain (2) (for model year 2007 - LY7).
It may take several thousand miles of use before the timing chains begin to stretch. Inspect both the primary drive and both secondary drive timing chains for the following conditions:
| • | Binding Links |
| • | Loose Links |
| • | Loose Pins |
If any of the chains are stretched, replace the primary drive and both secondary drive timing chains only. Do Not replace any of the other timing chain component parts.
Parts Information
Part Number | Description | Qty |
|---|---|---|
12599718 | Timing Chain, Primary (Second Design) | 1 |
12599716 | Timing Chain, Secondary (Second Design) | 2 |
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J0820 | Chain, Camshaft Timing - Replace | Use Published Labor Operation Time |
