GMC G1500 Window Motor Guide for 1979-1995 Models
If your van's power window is slow, noisy, or stuck, a new window motor is likely the solution.
- Slow, noisy, or completely stuck windows are the most common symptoms of a failing motor.
- Aftermarket brands like Dorman and Cardone are reliable and affordable choices for this van.
- You can replace just the motor, but replacing the motor and regulator assembly together can prevent future problems.
- The job is DIY-friendly, and taping the window up before you start is a crucial step for safety and ease of repair.
Is Your GMC G1500 Window Motor Failing?
On these G-series vans, the window motors work hard to move the large, heavy door glass. Over time, it's common for them to wear out. The most frequent signs of a failing window motor are when the window moves very slowly, makes grinding or clicking noises, or stops moving altogether. Sometimes, the window might work intermittently, which could also point to a bad motor or a wiring issue in the door harness. If you hear the motor running but the glass doesn't move, the problem is more likely the window regulator, the part the motor attaches to.
Choosing an Aftermarket Window Motor
For a vehicle from this era, aftermarket parts are a practical and affordable choice. Original Equipment (OEM) parts are likely discontinued or very hard to find. Aftermarket brands like Dorman, Cardone, and Replacement offer direct-fit motors that meet or exceed original quality.
Aftermarket Brand Overview
| Brand | Known For | Notes for G1500 Owners |
|---|---|---|
| Dorman | Wide availability and often includes improvements over the original design. Some users report inconsistent quality, but they are a popular choice and often come with a lifetime warranty. | A solid, widely available choice. Dorman often provides solutions for common failure points in original parts. They offer both the motor and motor/regulator assemblies. | 🎬 Compare the quality of Dorman replacement window regulators.
| Cardone (A1 Cardone) | Offers both new and remanufactured parts, with a focus on refining original designs for better durability. | A good option, especially if you prefer a remanufactured part that has been updated to address original weaknesses. |
| Replacement | A budget-friendly brand offering parts that are designed to be a direct, no-frills replacement for the factory motor. | This is a cost-effective solution to get your window working again. Quality is generally considered standard for aftermarket parts. |
Motor Only vs. Motor and Regulator Assembly
You can buy the window motor by itself or as a complete assembly with the window regulator. If your window moves slowly or has stopped, but you don't hear grinding or see the glass tilting, replacing just the motor is usually enough. However, the regulator's gears and cables can also wear out. Replacing the entire assembly can save you from having to do the job twice and is often recommended if the regulator is also old.
Frequently Asked Questions (FAQ)
Is it hard to replace the window motor on a 1979-1995 G1500?
The replacement is straightforward for a DIYer with basic tools. It involves removing the interior door panel, accessing the motor, and unbolting it from the regulator. 🎬 Watch a step-by-step G-series window motor replacement guide. A common pro-tip is to tape the window glass in the 'up' position so it doesn't fall when you remove the motor. Some mechanics drill access holes in the inner door skin to more easily reach the motor's mounting bolts, which can turn a difficult job into a one-hour task.
🎬 See helpful tips and tricks for faster motor installation.My window switch clicks but the window doesn't move. Is it the motor?
A clicking sound usually means the switch is sending power, but the motor is unable to operate. This is a very strong indicator that the window motor has failed. It could be seized internally or have a burned-out component.
Are there any recalls for the window motor on my G1500?
No, a search of the National Highway Traffic Safety Administration (NHTSA) database shows no recalls or specific technical service bulletins (TSBs) for the window motors on the 1979-1995 GMC G1500. Any recalls found for GMC vans are for much newer models and different issues, like window switches or glass types.
Should I replace the motor on the other door at the same time?
It's not required, but it's a good preventative measure. The window motors on both doors have experienced the same amount of use and aging. If one has failed, the other may not be far behind. Since you'll have the tools out, it can be efficient to do both at once.
Helpful Videos
Technical Specifications
OEM Part Numbers: 11M23
This is a 12V DC electric motor. Aftermarket replacements are designed as direct-fit, meaning they will have the correct mounting points and electrical connector to plug into the factory harness without modification. Some aftermarket kits may include a short pigtail adapter.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.