ACDelco 38178 Accessory Drive Belt Tensioner Assembly

Part Number
Accessory Drive Belt Tensioner AssemblyFits: 02-09 Chevrolet Trailblazer, 02-06 Chevrolet Trailblazer EXT, 02-09 GMC Envoy, 02-06 GMC Envoy XL, 02-04 Oldsmobile Bravada, 03-08 Isuzu Ascender, 04-07 Buick Rainier, 04-12 Chevrolet Colorado, 04-12 GMC Canyon, 04-05 GMC Envoy XUV, 05-09 Saab 9-7x, 06-10 Hummer H3, 06 Isuzu i-280, 06 Isuzu i-350, 07-08 Isuzu i-290, 07-08 Isuzu i-370, 09-10 Hummer H3T
Special Price $56.09 Regular Price $65.99
In stock
Only 4 left
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Estimated Ship Date: 1 Business Day or Less



Measurements70 mm x 17 mm x 25 mm
Mkt_State_Warranty_CALimited Lifetime Warranty as long as original purchaser still owns vehicle (Parts Only).
Mkt_State_Warranty_USLimited Lifetime Warranty (Parts Only). Please see for more details.



  • 2002-2006 GMC Envoy XL
  • 2006-2006 Isuzu i-350
  • 2004-2012 Chevrolet Colorado
  • 2002-2009 Chevrolet Trailblazer
  • 2005-2009 Saab 9-7x
  • 2007-2008 Isuzu i-370
  • 2009-2010 Hummer H3T
  • 2002-2004 Oldsmobile Bravada
  • 2007-2008 Isuzu i-290
  • 2002-2009 GMC Envoy
  • 2004-2007 Buick Rainier
  • 2006-2010 Hummer H3
  • 2004-2012 GMC Canyon
  • 2006-2006 Isuzu i-280
  • 2003-2008 Isuzu Ascender
  • 2002-2006 Chevrolet Trailblazer EXT
  • 2004-2005 GMC Envoy XUV
Customer Questions
Does AC Delco make Ford parts?
No, AC Delco produces parts primarily for General Motors vehicles and does not make parts specifically for Ford vehicles.
Can I use AC Delco parts to replace OEM parts?
Yes, in most cases AC Delco parts can be used as a replacement for OEM parts. However, it's important to ensure that the parts are compatible with your specific make and model of vehicle.
What AC Delco oil filter do I need?
AC Delco offers a variety of oil filters that are compatible with different makes and models of vehicles. To determine which AC Delco oil filter you need, consult your vehicle's owner's manual or use our online filter lookup tool that matches the make, model, and year of your vehicle.
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