Guide to the 1991-2005 GMC Jimmy Brake Light Switch
Solve common brake light and cruise control problems by understanding how this simple part fails.
- A faulty brake light switch can cause no brake lights, cruise control failure, or prevent shifting from Park.
- If your third brake light works but the main ones don't, suspect the multi-function (turn signal) switch, not the brake light switch.
- Replacement is a simple DIY task located above the brake pedal, usually taking less than 30 minutes.
- Reputable aftermarket brands like ACDelco and Standard Ignition offer reliable, low-cost replacements.
Signs of a Failing Brake Light Switch
A bad brake light switch can cause several confusing problems. Because the part is connected to multiple systems, a failure can show up in ways that don't seem related to the brake lights.
- No Brake Lights: The most obvious and dangerous symptom is when your brake lights don't turn on at all when you press the pedal.
- Brake Lights Stuck On: The switch can fail in the 'on' position, leaving your brake lights illuminated constantly, which can drain your battery and confuse other drivers.
- Cruise Control Won't Work: If the switch is faulty, your cruise control may not engage or might shut off unexpectedly. The system needs a clear signal from the brake switch to operate safely.
- Can't Shift Out of Park: Many automatic GMC Jimmys require a signal that the brake is pressed before you can shift out of Park. A bad switch can leave you stranded. 🎬 Watch: How to fix a shifter that is stuck in park.
- ABS Warning Light: A faulty switch can send an incorrect signal to the ABS module, sometimes causing the ABS warning light to appear on your dashboard.
Special Note: Third Brake Light Works, Main Lights Don't
A very common issue on the GMC Jimmy and similar GM trucks is when the high-mount (third) brake light works, but the main left and right brake lights do not. This is often NOT a problem with the brake light switch itself. Power for the main brake lights runs through the multi-function switch (the turn signal stalk). If that switch fails internally, it can prevent the brake lights from working. If your third brake light works, investigate the multi-function switch before replacing 🎬 See how to diagnose brake light issues on your Jimmy. the brake light switch.
Choosing the Right Aftermarket Brake Light Switch
For the GMC Jimmy, the brake light switch is an inexpensive and simple part. You don't necessarily need to buy the most expensive option, but choosing a reputable brand is important for reliability. All listed brands are established manufacturers.
Brand Quality Tiers
- ACDelco: As GM's official parts division, ACDelco is the closest you can get to the original factory part. For owners who prefer to stick with Original Equipment (OE) specifications, this is the top choice. Quality and fit are guaranteed to match what your Jimmy was built with.
- Standard Ignition (SMP): Standard Motor Products is a major, well-respected aftermarket manufacturer with over 100 years of experience. Their parts are known for meeting or exceeding OE standards and are trusted by professional mechanics. They are an excellent and reliable alternative to ACDelco.
- Rostra Powertrain: Rostra is known for powertrain and electronic components, especially cruise control systems. While they produce quality parts, their primary focus isn't always on direct OE replacement switches for this specific vehicle line, but they are a valid aftermarket option.
Pro Tip: Given the low cost of this part, the price difference between a trusted aftermarket brand like Standard and an OE-equivalent like ACDelco is often just a few dollars. Both are excellent choices for this repair.
Typical Replacement Costs
The cost for a new aftermarket brake light switch is very low. Professional installation is also inexpensive due to the simplicity of the job.
| Part Type | Part Cost | Shop Labor Cost |
|---|---|---|
| New Aftermarket | $10.36 - $21.59 | $45 - $85 |
| New OEM (ACDelco) | $15 - $30 |
Frequently Asked Questions
Where is the brake light switch located on a 1991-2005 GMC Jimmy?
The brake light switch is mounted on the brake pedal support bracket, located up under the dashboard. You will need to look above the brake pedal arm to see it. It is a small plastic switch with a wiring connector, and it is physically actuated by the movement of the brake pedal.
Can I replace the brake light switch myself?
Yes, this is a very feasible DIY job for most owners. The replacement typically requires no special tools, though working in the footwell can be awkward. The process involves removing a small retaining clip, sliding the switch off the pedal push-rod, disconnecting the electrical plug, and installing the new one in reverse order.
🎬 Watch this step-by-step guide to replacing your brake light switch.Are there any recalls for the GMC Jimmy brake light switch?
Searches of the National Highway Traffic Safety Administration (NHTSA) database did not show any specific safety recalls for the brake light switch on the 1991-2005 GMC Jimmy. Recalls found for GM brake switches apply to different, much newer models and different types of switches.
What is the difference between a brake light switch and a multi-function switch failure?
A bad brake light switch usually causes ALL brake lights to fail or causes other issues like cruise control failure. On these trucks, if only the two main brake lights fail but the third brake light on the liftgate still works, the problem is more likely the multi-function (turn signal) switch in the steering column.
Helpful Videos
Technical Specifications
OEM Part Numbers: 15741137
Typically a 6-terminal, push-on switch made of plastic that mounts to the brake pedal bracket.
We Have This Part in Stock
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.
- GMC Jimmy: