P0008 on GMC
Engine Position System Performance - Bank 1
P0008 on GMC vehicles indicates engine position system performance - bank 1. Au7o has documented this code across 1 GMC model — most commonly on Acadia. P0008 means the engine computer detected that Bank 1 of the engine is timed incorrectly relative to where it should be — specifically, the relationship between the crankshaft and camshaft positions on that bank is off. The 'Engine Position System' refers to the components (timing chain/belt, sprockets, tensioners, and the variable valve timing actuators) that keep the camshafts synchronized with the crankshaft. When the computer commands a timing position but the sensors report the bank is out of the expected range, it sets this code. It generally signals a mechanical timing problem on Bank 1 that can affect performance and, if severe, risk internal engine damage.
Common Causes of P0008
- •Stretched or worn timing chain
- •Failed or worn timing chain guides or tensioner
- •Faulty camshaft position (VVT/VCT) actuator or solenoid
- •Low or dirty engine oil affecting timing actuator operation
- •Jumped or mistimed timing chain/belt after service
- •Faulty crankshaft or camshaft position sensor
- •Clogged oil control valve or oil passages
P0008 on GMC by Model
GMC Acadia(1 issue)
- High-Feature V6 Timing-Chain Correlation DTC Bulletin2007-2012
GM bulletin 10245795 documents timing-chain and guide service information for High Feature V6 engines that set camshaft-to-crankshaft correlation DTCs P0008, P0009, P0016, P0017, P0018 or P0019.
Looking for P0008 on a different make?
View P0008 across all makes →Frequently Asked Questions
What does P0008 mean on GMC?▼
P0008 stands for "Engine Position System Performance - Bank 1." P0008 means the engine computer detected that Bank 1 of the engine is timed incorrectly relative to where it should be — specifically, the relationship between the crankshaft and camshaft positions on that bank is off. The 'Engine Position System' refers to the components (timing chain/belt, sprockets, tensioners, and the variable valve timing actuators) that keep the camshafts synchronized with the crankshaft. When the computer commands a timing position but the sensors report the bank is out of the expected range, it sets this code. It generally signals a mechanical timing problem on Bank 1 that can affect performance and, if severe, risk internal engine damage. On GMC specifically, this code is documented across 1 model.
What causes P0008 on GMC vehicles?▼
Common causes on GMC: Stretched or worn timing chain, Failed or worn timing chain guides or tensioner, Faulty camshaft position (VVT/VCT) actuator or solenoid, Low or dirty engine oil affecting timing actuator operation, Jumped or mistimed timing chain/belt after service. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0008 on a GMC?▼
Repair costs vary widely depending on the root cause and specific GMC model.
Which GMC models have P0008 documented?▼
Au7o has documented P0008 on 1 GMC model: Acadia.