LP1, LY7 MIL/DTCs P0008, P0009, P0016, P0017, P0018 or P0019 (Replace Primary Drive and Both Secondary Drive Time Chains)
| Subject: | LP1, LY7 MIL/DTCs P0008, P0009, P0016, P0017, P0018 or P0019 (Replace Primary Drive and Both Secondary Drive Timing Chains) |
| Models: | 2007 Cadillac CTS, SRX, STS |
| 2007 Buick LaCrosse/Allure |
| with 2.8L HFV6 or 3.6L HFV6 Engine (VINs T, 7 -- RPOs LP1, LY7) |
Condition
Some customers may comment on the Malfunction Indicator Lamp (MIL) being illuminated. Technicians may find the following Diagnostic Trouble Codes (DTCs) stored:
| • | DTC P0008 : Engine Position System Performance Bank 1 |
| • | DTC P0009 : Engine Position System Performance Bank 2 |
| • | 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
This condition may be caused by stretched primary drive and both secondary drive timing chains.
Correction
Refer to SI for the follow diagnostic information if only one of the following DTCs are set:
| • | DTC P0008 |
| • | DTC P0009 |
| • | DTC P0016 |
| • | DTC P0017 |
| • | DTC P0018 |
| • | DTC P0019 |
If there are more than one of the above mention DTCs set, inspect for stretched timing chains. 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/kilometers of use before the timing chains begin to stretch. Inspect both the primary drive and both secondary drive timing chains for the following:
| • | 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) | 1 |
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J0820 | Chain, Camshaft Timing -- Replace | Use Published Labor Operation Time |
