ACDelco 6K945 | Serpentine Belt

Part Number
Serpentine Belt

Fits: 88-92 Chevrolet Camaro, 88-92 Pontiac Firebird, 89-90 Chevrolet Caprice, 91-92 Cadillac Brougham, 96-02 Chevrolet Camaro, 91-92 Jeep Comanche, 91-95 Jeep Wrangler, 96-02 Pontiac Firebird, 93-94 Jeep Cherokee, 06-11 Mercedes-Benz E350, 07-10 Mercedes-Benz CL550, 08-09 Mercedes-Benz C300, 08-09 Mercedes-Benz C350, 08-09 Mercedes-Benz CLK550, 08-12 Mercedes-Benz GL550, 08-11 Mercedes-Benz ML550, 08-12 Mercedes-Benz SL550, 08 Mercedes-Benz SLK280, 08-11 Mercedes-Benz SLK350, 09-11 Buick Lucerne, 09-15 Mercedes-Benz G550, 09-11 Mercedes-Benz R350, 09-11 Mercedes-Benz S550, 09-11 Mercedes-Benz SLK300, 10 Buick Allure, 10-16 Buick LaCrosse, 10-11 Mercedes-Benz CLS550, 10 Mercedes-Benz E550, 10-12 Mercedes-Benz GL450, 10-12 Mercedes-Benz GLK350, 10-11 Mercedes-Benz ML350, 13-19 Cadillac XTS

Special Price $44.84 Regular Price $52.75
In stock
Only 9 left
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Estimated Ship Date: 1 Business Day or Less
ACDelco Professional, premium aftermarket V-Ribbed Advanced Technology Belts serve as replacement belts for accessory belt drive systems (ABDS) and other serpentine belt applications. They are designed using advanced manufacturing technology and premium EPDM rubber construction to provide customers with superior accessory belt drive systems (ABDS) and new-vehicle-type performance. These premium aftermarket replacement v-ribbed advanced technology belts are manufactured to meet your expectations for fit, form, and function.



  • Able to operate and accept misalignment in the accessory belt drive systems (ABDS) far greater than other serpentine belts
  • Is the belt of choice by professional technicians, lasting 50% to 60% longer than retail belts (low priced belts sold at car part stores)
  • Its flexible construction allows the belt to withstand billions of topside and backside bends resulting in a long belt life
  • Its precision dimension control of rib profile transmits load efficiently throughout the accessory belt drive systems (ABDS) allowing components to operate at optimum levels
  • Made with temperature and crack resistant EPDM rubber for a long life and quiet, dependable performance
  • Manufactured using quality materials to help provide long life, minimize noise, reduce loss of tension, and solve problem applications


FAQ - A1Yes, this may be indicative of an alignment issue or a failed tensioner.
FAQ - A2Yes, you may lose your power steering or stall out. Your car is not drivable when your drive belt fails.
FAQ - A3Yes, the leading causes of belt failure are improper tension and misaligned pulleys. Both these conditions cause excessive heat which leads to belt failure. Have your belts checked every 3,000 miles for belt wear, proper tension, and pulley alignment.
FAQ - A4No, when the belt backing has been torn or cracked, the belt should be replaced.
FAQ - A5No, use the belt in the way it's listed in the ACDelco belts and hoses catalog.
FAQ - A6No, remember the leading cause of belt failure is improper tension and misaligned pulleys. Improper tension will cause the belt to slip and you may notice a loss of performance from the air conditioning system as well as increased heat under the hood. High heat can lead to premature accessory failure.
FAQ - Q1Could an automotive belt tear during use?
FAQ - Q2Will I know immediately if an automotive belt tears?
FAQ - Q3Are there steps I can take to ensure a longer automotive belt life?
FAQ - Q4Is there a way to repair a torn automotive belt?
FAQ - Q5Can I use the same automotive belt for multiple uses?
FAQ - Q6Will a worn automotive belt affect gas mileage?
Good Maintenance Practices - S1 B1Do not use belt dressings to stop belt slippage or noise. These are oil based and may cause belt deterioration.
Good Maintenance Practices - S1 B2Never twist a belt more than 90 degrees during inspection. This may damage the tensile cords and cause premature failure.
Good Maintenance Practices - S1 B3Replace serpentine belts every 60,000 - 100,000 miles. Check vehicle's owner's manual.
Good Maintenance Practices - S1 B4Replace V-belts after 3 to 4 years, or every 36,000 to 48,000 miles.
Good Maintenance Practices - S1 B5Use an approved tension gauge to check belt tension.
Good Maintenance Practices - S1 B6Check for proper belt tension after 500 to 1,000 miles following belt installation. Recheck often, at least twice a year or every 6,000 miles.
Marketing Statement - Product LineBuilt to meet the latest demands, ACDelco's Belts and Hoses line includes automotive belts and hoses, tensioners, pulleys, and kits. ACDelco offers a wide variety of Professional premium, aftermarket parts, and a select offering of GM Original Equipment Belts that fit a variety of vehicles on the road today.
Marketing Statement - Sub BrandWhen it comes to replacing your Belts, ACDelco offers a full line of Professional, premium aftermarket Belt products. To help make part replacement simple and precise, ACDelco also offers pulleys, tensioners, and kits. ACDelco Professional, premium aftermarket belts fit both GM and Non GM vehicles.
Measurements13/16 in x 95 1/8 in
Mkt_State_Warranty_CALimited Lifetime Warranty as long as original purchaser still owns vehicle (Parts Only).
Mkt_State_Warranty_USLimited Lifetime as long as original purchaser owns vehicle. (Parts Only)
Signs of Wear & Troubleshooting - S1 B1Rubber Loss: (most common belt wear) a belt wear gauge measures rubber loss, which can result in reduced power transfer from the crank to the accessories.
Signs of Wear & Troubleshooting - S1 B2Glazing: shiny spots can indicate a slipping belt that isn't properly transferring power to accessories.
Signs of Wear & Troubleshooting - S1 B3Pilling: worn rubber can fill in grooves and cause noise, heat, vibration, and excessive wear.
Signs of Wear & Troubleshooting - S1 B4Abrasion: wear along the side could indicate misalignment due to a failed tensioner.
Signs of Wear & Troubleshooting - S1 B5Cracking: older neoprene belts crack as they near the end of their life cycle and often need to be replaced.
Signs of Wear & Troubleshooting - S1 B6Engine stops or backfires.
Signs of Wear & Troubleshooting - S1 B7The belt is producing a squealing noise.
Signs of Wear & Troubleshooting - S1 B8Headlights dim while driving.
Signs of Wear & Troubleshooting - S1 B9Loss of battery charge.



  • 2008-2011 Mercedes-Benz SLK350
  • 2010-2011 Mercedes-Benz CLS550
  • 1991-1992 Jeep Comanche
    • W/A.C.
  • 2008-2008 Mercedes-Benz SLK280
  • 1992-1992 Pontiac Firebird
    • W/A.C.
  • 1988-1988 Pontiac Firebird
    • Belt does not run directly from crank to A.P.; W/95 1/8" Belt O.C.
  • 2009-2011 Mercedes-Benz SLK300
  • 2008-2011 Mercedes-Benz ML550
  • 2013-2018 Cadillac XTS
    • W/M7U Trans.
  • 1989-1992 Chevrolet Camaro
  • 1998-2002 Pontiac Firebird
  • 2009-2011 Mercedes-Benz S550
  • 2010-2012 Mercedes-Benz GL550
    • W/O Variable Assist
  • 1989-1990 Chevrolet Caprice
    • W/O Police Pkg.
  • 2010-2012 Mercedes-Benz GLK350
  • 1996-1997 Pontiac Firebird
    • W/A.C.
  • 2008-2009 Mercedes-Benz C350
  • 1996-1997 Chevrolet Camaro
    • W/A.C.
  • 1993-1994 Jeep Cherokee
    • W/A.C.
  • 2009-2011 Mercedes-Benz R350
  • 2010-2012 Mercedes-Benz GL450
  • 1991-1995 Jeep Wrangler
    • W/A.C.
  • 2010-2016 Buick LaCrosse
  • 2008-2009 Mercedes-Benz CLK550
  • 2010-2010 Buick Allure
  • 1989-1991 Pontiac Firebird
  • 1998-2002 Chevrolet Camaro
  • 2009-2011 Buick Lucerne
  • 2010-2010 Mercedes-Benz E550
  • 2007-2010 Mercedes-Benz CL550
  • 2008-2009 Mercedes-Benz GL550
  • 1991-1992 Cadillac Brougham
    • W/100A. Alt.
  • 2010-2011 Mercedes-Benz ML350
  • 2008-2009 Mercedes-Benz C300
  • 2019-2019 Cadillac XTS
  • 1988-1988 Chevrolet Camaro
    • Belt does not run directly from crank to A.P.; W/95 1/8" Belt O.C.
  • 2009-2015 Mercedes-Benz G550
  • 2006-2011 Mercedes-Benz E350
  • 2008-2012 Mercedes-Benz SL550
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.
Can a serpentine belt cause smoke?
Yes, a serpentine belt can cause smoke. A serpentine belt is an essential component of a vehicle's engine system. It drives various accessories such as the alternator, power steering pump, water pump, and air conditioning compressor. If the serpentine belt becomes worn, damaged, or misaligned, it can cause friction and generate smoke.
Why is my serpentine belt squealing?
The serpentine belt can squeal due to various reasons, including tension issues, worn-out belt, or a problem with the belt's pulleys.
Is my serpentine belt too tight?
If your serpentine belt is causing issues like excessive noise or accelerated wear on the pulleys, it may indicate that the belt is too tight.
Why did my serpentine belt come off?
Serpentine belts can come off due to factors such as belt wear, improper tension, misaligned pulleys, or a faulty tensioner.
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