P0017 on GMC
Crankshaft/Camshaft Position Correlation - Bank 1 Sensor B
P0017 on GMC vehicles indicates crankshaft/camshaft position correlation - bank 1 sensor b. Au7o has documented this code across 2 GMC models — most commonly on Acadia, Terrain. This code means the engine computer has detected that the crankshaft and the Bank 1 'B' camshaft (typically the exhaust camshaft) are out of their proper timing relationship with each other. The computer compares the crankshaft position signal to the camshaft position signal, and when they don't line up within the allowed window, it sets this correlation code. This usually points to mechanical timing being off, most often from a stretched or worn timing chain, a slipped or stuck variable valve timing phaser, or a tensioner problem. You may notice rough running, low power, rattling at startup, or a no-start, and it should be addressed promptly to avoid valve-to-piston contact on some engines. Typical repair costs on GMC range from $1,000 to $5,500, depending on the specific model and root cause.
Common Causes of P0017
- •Stretched or worn timing chain
- •Worn or failed timing chain tensioner or guides
- •Stuck or faulty variable valve timing (VVT) cam phaser
- •Faulty VVT oil control/solenoid valve
- •Low or dirty engine oil affecting phaser operation
- •Faulty camshaft or crankshaft position sensor
- •Timing chain jumped a tooth or incorrect timing after service
- •Damaged reluctor (tone) ring
P0017 on GMC by Model
GMC Acadia(2 issues)
- 3.6L V6 Timing Chain Stretch and Premature Failure2007-2016
The 3.6L LLT and LFX V6 engines in 2007-2016 Acadia are notorious for premature timing chain stretch and guide failure, typically between 60,000-120,000 miles. The engines use three separate timing chains (primary and two secondary), and all three are subject to premature stretch. Stretched chains cause cam timing correlation codes (P0008, P0009, P0016, P0017, P0018, P0019), rough running, and potential catastrophic engine damage if a chain jumps a tooth or breaks. Low oil level and using non-Dexos oil accelerates wear. GM issued TSB 09-06-01-008 acknowledging the issue.
- 3.6L V6 Internal Water Pump Failure and Coolant Leak2007-2023
The 3.6L V6 engines (all generations) in the Acadia use a timing chain-driven internal water pump located inside the engine block rather than a traditional externally-driven pump. The internal water pump impeller is plastic and is prone to cracking or separating from the shaft between 80,000-140,000 miles. When the impeller fails, the engine loses coolant circulation leading to rapid overheating. Because the pump is internal, it is only accessible during timing chain work — making this a very expensive repair if done as a standalone job.
GMC Terrain(1 issue)
- Ecotec 2.4L Timing Chain and Tensioner Failure2010-2014
The GM Ecotec 2.4L in the 2010-2014 Terrain has the same timing chain stretch and tensioner failure as the Equinox and Malibu. GM Special Coverage Adjustment SCA 12313C covers some vehicles. The 2010-2011 models are worst affected. Improperly hardened piston rings on 2010-2013 models cause excessive oil burning, which leads to low oil and accelerated timing chain wear. 2015+ models received revised internal components.
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View P0017 across all makes →Frequently Asked Questions
What does P0017 mean on GMC?▼
P0017 stands for "Crankshaft/Camshaft Position Correlation - Bank 1 Sensor B." This code means the engine computer has detected that the crankshaft and the Bank 1 'B' camshaft (typically the exhaust camshaft) are out of their proper timing relationship with each other. The computer compares the crankshaft position signal to the camshaft position signal, and when they don't line up within the allowed window, it sets this correlation code. This usually points to mechanical timing being off, most often from a stretched or worn timing chain, a slipped or stuck variable valve timing phaser, or a tensioner problem. You may notice rough running, low power, rattling at startup, or a no-start, and it should be addressed promptly to avoid valve-to-piston contact on some engines. On GMC specifically, this code is documented across 2 models.
What causes P0017 on GMC vehicles?▼
Common causes on GMC: Stretched or worn timing chain, Worn or failed timing chain tensioner or guides, Stuck or faulty variable valve timing (VVT) cam phaser, Faulty VVT oil control/solenoid valve, Low or dirty engine oil affecting phaser operation. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0017 on a GMC?▼
Repair costs on GMC range from $1,000 to $5,500, depending on the specific model and root cause.
Which GMC models have P0017 documented?▼
Au7o has documented P0017 on 2 GMC models: Acadia, Terrain.