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Shop GMC W3500 Forward Parts

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Replacement REPC313813 Accessory Belt Idler Pulley - Direct Fit, Sold individually
Vehicle Info Required to Guarantee Fit
$8.53
Vehicle Fitment
  • 1995 - 2003 GMC W3500 Forward W3S042 8 Cyl 5.7L
Product Details
Location : Passenger SideNotes : 1 bearing; 17 mm ID; 76 mm pulley diameter; 31 mm pulley width; 20 mm max belt width; Steel material; Serpentine type; FlatWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Sold individuallyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Replacement SET-REPC313813-2 Accessory Belt Idler Pulley - Direct Fit, Set of 2
Vehicle Info Required to Guarantee Fit
$16.06
Vehicle Fitment
  • 1995 - 2003 GMC W3500 Forward W3S042 8 Cyl 5.7L
Product Details
Notes : 3 in. OD; 1.22 in. W; Flat; With steel flangeComponents : (2) Accessory Belt Idler PulleysWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Set of 2Prop 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Intake Manifold Gasket - Set
Replacement
Part Number: RC31240002
Vehicle Info Required to Guarantee Fit
$10.93
Vehicle Fitment
  • 2004 - 2007 GMC W3500 Forward W3S042 8 Cyl 6.0L
Product Details
Quantity Sold : SetWarranty : 1-year unlimited-mileage warrantyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Replacement RC38100001 Vapor Canister Purge Solenoid - Direct Fit, Sold individually
Vehicle Info Required to Guarantee Fit
$13.21
Vehicle Fitment
  • 2004 - 2006 GMC W3500 Forward W3S042 8 Cyl 6.0L
Product Details
Warranty : 1-year unlimited-mileage warrantyQuantity Sold : Sold individuallyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Valve Cover - Driver Side
Replacement
Part Number: RC32040008
Vehicle Info Required to Guarantee Fit
$38.51
Vehicle Fitment
  • 2004 - 2008 GMC W3500 Forward W3S042 8 Cyl 6.0L
Product Details
Replaces OE Number : 12570427, 8125618200, 8125704270Quantity Sold : Sold individuallyWarranty : 1-year unlimited-mileage warranty
Replacement RC31740005 Accessory Belt Idler Pulley - Direct Fit, Sold individually
Vehicle Info Required to Guarantee Fit
$9.86
Vehicle Fitment
  • 2004 - 2005 GMC W3500 Forward W3S042 8 Cyl 6.0L
Product Details
Location : SerpentineWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Sold individuallyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Replacement RC31740003 Accessory Belt Idler Pulley - Direct Fit, Sold individually
Vehicle Info Required to Guarantee Fit
$5.33
Vehicle Fitment
  • 2004 - 2007 GMC W3500 Forward W3S042 8 Cyl 6.0L
Product Details
Location : Air ConditioningNotes : Flat; 60 mm OD; 12 mm ID; 21.25 mm WWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Sold individuallyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Ignition Coil Round Type - Sold individually
Replacement
Part Number: REPC504602
Vehicle Info Required to Guarantee Fit
$22.65
Vehicle Fitment
  • 2003 GMC W3500 Forward W3S042 4 Cyl 4.8L
  • 2003 GMC W3500 Forward W3S042 8 Cyl 5.7L
Product Details
Voltage : 12VConfiguration : 4-Prong Blade Male Terminal; 1 Female ConnectorQuantity Sold : Sold individuallyWarranty : 1-year unlimited-mileage warrantyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Ignition Coil Round Type - Set of 4
Replacement
Part Number: SET-REPC504602-4
Vehicle Info Required to Guarantee Fit
$78.73
Vehicle Fitment
  • 2003 GMC W3500 Forward W3S042 4 Cyl 4.8L
  • 2003 GMC W3500 Forward W3S042 8 Cyl 5.7L
Product Details
Voltage : 12VConfiguration : 4-Prong Blade Male Terminal; 1 Female ConnectorComponents : (4) Ignition CoilsQuantity Sold : Set of 4Warranty : 1-year unlimited-mileage warrantyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Ignition Coil Round Type - Set of 8
Replacement
Part Number: SET-REPC504602-8
Vehicle Info Required to Guarantee Fit
$157.62
Vehicle Fitment
  • 2003 GMC W3500 Forward W3S042 4 Cyl 4.8L
  • 2003 GMC W3500 Forward W3S042 8 Cyl 5.7L
Product Details
Voltage : 12VConfiguration : 4-Prong Blade Male Terminal; 1 Female ConnectorComponents : (8) Ignition CoilsQuantity Sold : Set of 8Warranty : 1-year unlimited-mileage warrantyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Ignition Coil - Set of 8
Replacement
Part Number: REPC504606
Vehicle Info Required to Guarantee Fit
$128.19
Vehicle Fitment
  • 2003 GMC W3500 Forward W3S042 8 Cyl 5.7L
Product Details
Voltage : 12VConfiguration : 4-Prong Blade Male Terminal; 1 Female ConnectorQuantity Sold : Set of 8Warranty : 1-year unlimited-mileage warrantyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Universal Oxygen Sensor, Heated, 4-Wire, Sold Individually
Vehicle Info Required to Guarantee Fit
$22.65
Vehicle Fitment
  • 1995 - 2008 GMC W3500 Forward All Submodels All Engines
Product Details
Notes : Heated; Designed to fit screw-in type bungs; May not fit with flanges; Includes Butt type connectors, without plugType : 4-wireQuantity Sold : Sold individuallyProduct Fit : UniversalWire Length : 5.91 in. Wire LengthMounting Style : Threaded-in Mounting StyleWarranty : 1-year unlimited-mileage warrantyProp 65 Warning : <p><b><img src="https://cld.partsimg.com/image/upload/images/warning_a.jpg" alt="Warning Symbol" width="28" height="22" />WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to <a href="https://www.p65warnings.ca.gov">www.P65Warnings.ca.gov</a>.</b></p>
Universal Oxygen Sensor, Heated, 4-Wire, Set of 2
Replacement
Part Number: SET-USOS-4000-2
Vehicle Info Required to Guarantee Fit
$43.04
Vehicle Fitment
  • 1995 - 2008 GMC W3500 Forward All Submodels All Engines
Product Details
Notes : Designed to fit screw-in type bungs; May not be compatible with flangesComponents : (2) Oxygen SensorsType : 4-wireQuantity Sold : Set of 2Product Fit : UniversalWire Length : 5.91 in. Wire LengthMounting Style : Threaded-inIncludes : Butt type connectors, without plugWarranty : 1-year unlimited-mileage warranty
Universal Oxygen Sensor, Heated, 4-Wire, Set of 3
Replacement
Part Number: SET-USOS-4000-3
Vehicle Info Required to Guarantee Fit
$64.55
Vehicle Fitment
  • 1995 - 2008 GMC W3500 Forward All Submodels All Engines
Product Details
Notes : Designed to fit screw-in type bungs; May not be compatible with flangesComponents : (3) Oxygen SensorsType : 4-wireQuantity Sold : Set of 3Product Fit : UniversalWire Length : 5.91 in. Wire LengthMounting Style : Threaded-inIncludes : Butt type connectors, without plugWarranty : 1-year unlimited-mileage warranty
Universal Oxygen Sensor, Heated, 4-Wire, Set of 4
Replacement
Part Number: SET-USOS-4000-4
Vehicle Info Required to Guarantee Fit
$86.07
Vehicle Fitment
  • 1995 - 2008 GMC W3500 Forward All Submodels All Engines
Product Details
Notes : Designed to fit screw-in type bungs; May not be compatible with flangesComponents : (4) Oxygen SensorsType : 4-wireQuantity Sold : Set of 4Product Fit : UniversalWire Length : 5.91 in. Wire LengthMounting Style : Threaded-inIncludes : Butt type connectors, without plugWarranty : 1-year unlimited-mileage warranty
Page 1 of 480 | Showing 1 - 15 of 7197 results

GMC W3500 Forward Customer Reviews

Two thumbs up
Rita Bridges
VERIFIED PURCHASER
Purchased on Apr 16, 2020
He came in a couple of weeks easy to install haven't have a problem yet also bought a lot of other parts I give my feedback on my new Cadillac converter window regulators
Donterrius Mickles
VERIFIED PURCHASER
Purchased on Mar 01, 2020
Universal Oxygen Sensor, Heated, 4-Wire, Set Of 2
Mar 05, 2020
Didn’t quite fit
Well I’m not super surprised this doesn’t fit. I have a 1987 Range Rover Classic, so it’s not too easy to find parts for. I filed for a return (had to call, the online thing didn’t work) but I am getting my money back. Like I said, my car is super specific, so parts that fit are rare - but the website did guarantee a fit. Oh well. You will need to splice the wires off the old sensor and plug them using little connectors they have. It shouldn’t be too bad of a job really.
Logan Martin
VERIFIED PURCHASER
Purchased on Feb 18, 2020

GMC W3500 Forward Guides

GMC W3500 Forward: Under-The-Hood Preventive Maintenance Tips to Help You Save on Repair Costs

When a pickup truck is not enough for your needs, you can always rely on the GMC W3500 Forward to carry all the loads that have to be transported. It has spacious cargo area and heavy duty capability that are perfect for moving heavy objects and large cargoes. And if you are using that W3500 Forward for your business, you need this vehicle to be always at its top performance and not spending a lot on repairs. That's quite possible if you know how to take care of your vehicle especially when it comes to under-the-hood maintenance. Below are some tips that can help you do that:

  • Take care of the battery.

One of the easiest ways to take care of your battery is to park your vehicle properly especially in the winter. Park the truck in a well-insulated garage but skip heated garages since they can cause rusting in your vehicle. You also need to make sure that the battery is always clean. A filthy battery connection tends to weaken the charge and cause startup problems. Cleaning the battery is easy—just remove the clamps and clean away the grease, dirt, and oxidation that has formed. Secure the battery in the engine bay so it will not jiggle when you're driving. A loose battery can be bad for the other parts of your engine and battery acid could spill all over the motor.

  • Practice radiator maintenance.

Keeping the radiator in top shape is one of the best ways to make sure that your engine is running at its best. Don't wait until your engine is overheating before you check on your radiator and cooling system. One thing that you should always remember is to use the correct mixture of antifreeze/coolant and water. It should be a 50/50 mix, and you should never put straight water in there unless it's an emergency. Periodically checking the radiator for signs of leaks is also advised. Your radiator needs fluid to function, and it should always be full.

  • Know when it's time to replace the water pump.

If you ever wonder how the cooling system in your GMC W3500 Forward works, you have the water pump among the parts to thank for that. It is responsible for circulating the coolant in the engine so it will not overheat. After putting on a lot of miles, your truck's water pump has also already undergone years of pumping coolant, and it will start to wear out. If you hear some whining or grinding sound from the water pump or notice some coolant leaking, it's time for replacement. In most cases, you will also need to replace the timing belt.

  • Change the air filter at the right time.

You probably want great mileage from your Forward. If so, you better inspect your vehicle's air filter regularly. A dirty or clogged air filter can reduce your gas mileage by up to 10%. Fortunately, if you have a dirty filter, you can always change it, and it only takes less than 5 minutes. So when do you need to get that replacement? It is advisable to have it replaced once a year or every 15,000 miles. However, if you are driving that semi on dirt roads, you will need to change the air filter every few months.

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