How to replace the timing chain, sprockets, and tensioner on 2003 GMC Envoy?

Removing camshaft cover and engine front cover is required to remove timing chain, sprockets or tensioner. De-tension the timing chain and the top chain guide and camshaft sprockets among other parts are removed. Install timing chain tensioner and guides making sure it is installed properly. Install the covers again later.

OEM 2003 GMC Envoy Timing Chain

Engine Timing Chain

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2003 GMC Envoy Timing Chain Part Number: 12571725
$77.80 MSRP: $187.59
You Save: $109.79 (59%)
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Product Specifications
- Other Name: Chain, Engine Timing
- Replaces: 24100062
- Item Weight: 1.40 Pounds
- Item Dimensions: 6.3 x 5.2 x 0.6 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12571725
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 GMC Envoy Submodels:
- SLE, SLT | 6 Cyl 4.2 L GAS

2003 GMC Envoy Timing Chain

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2003 GMC Envoy Timing Chain Parts and Q&A

Q: How to replace the timing chain, sprockets, and tensioner on 2003 GMC Envoy?
A: Removing camshaft cover and engine front cover is required to remove timing chain, sprockets or tensioner. De-tension the timing chain and the top chain guide and camshaft sprockets among other parts are removed. Install timing chain tensioner and guides making sure it is installed properly. Install the covers again later.