GMC G1500 Turn Signal Switch Guide for 1979-1995 Van Models
Having trouble with your van's blinkers? Here’s what you need to know before replacing the turn signal switch.
- You must verify if your van has a tilt steering column or cruise control before buying a new switch, as the parts are different.
- Common failure symptoms include signals not canceling, not working at all, or needing to be held in place.
- Replacement is a moderate-difficulty DIY job that requires special tools like a steering wheel puller and lock plate compressor.
- Before replacing the switch, always check the bulbs and the flasher relay first to rule out simpler problems.
Is Your Turn Signal Switch Failing?
The turn signal switch in a GMC G-series van is a high-use part that can wear out over time. The plastic and metal contacts inside get tired. When it starts to fail, the symptoms can be annoying and unsafe. It's important to fix it to stay safe and legal on the road.
Common Symptoms of a Bad Switch:
- Turn signals don't work at all: You move the lever, but nothing happens—no clicking sound and no flashing lights on the dash or outside.
- Signals won't stay on: You have to physically hold the lever in place to keep the blinker flashing. This often points to a mechanical failure inside the switch.
- Blinkers don't cancel: After you make a turn, the signal keeps blinking until you manually turn it off. This is a classic sign of a broken canceling cam within the switch.
- Only one side works: A failed switch can prevent electricity from reaching just the left or right side lights.
- Hazard lights malfunction: Since the hazard light function is often built into the switch, a bad switch can cause them to stop working.
- Other electrical problems: On vans equipped with it, a failing switch might cause the high beams or cruise control to act up.
Choosing the Right Aftermarket Switch
For a vehicle from this era, aftermarket parts offer good value. OEM parts can be hard to find and expensive. Aftermarket brands often meet or exceed the original quality. The most important thing is to buy the correct switch for your van's specific features.
Aftermarket Brand Tiers
- Premium Aftermarket (e.g., Standard Ignition): Brands like Standard Motor Products (SMP) are well-regarded by professional technicians. They focus on strict quality control and use durable materials, often making them a reliable choice that is close to original equipment performance.
- Quality Aftermarket (e.g., Rostra, Dorman): Rostra is a known manufacturer of automotive electronics. These brands provide a good balance of quality and price, making them a popular choice for DIY repairs. They are designed to be a direct fit.
- Value-Oriented (e.g., Replacement): These are often the most affordable options. While some owners have success with lower-cost switches, quality can be inconsistent. For a part that requires significant labor to access, it may be worth spending a little more for a part with a better reputation.
| Part Type | Price Range |
|---|---|
| New Aftermarket | $35 - $120 |
| Shop Labor | $150 - $300 |
Prices are estimates and can vary based on brand, location, and vehicle options.
Frequently Asked Questions
Is replacing the turn signal switch a DIY job?
Yes, if you have the right tools and patience. It is a moderately difficult job. You will need to remove the steering wheel, which requires a steering wheel puller and a lock plate compressor tool to access the switch inside the column. Several videos online show the process for similar GM trucks. If you are not comfortable with this, a professional mechanic can do the job in 1.5-2.5 hours.
Do I need any special tools for the replacement?
Yes. To do this job correctly on these vans, you will almost certainly need a steering wheel puller and a steering wheel lock plate compressor. You will also need basic hand tools like a socket set and screwdrivers.
Why do my hazard lights work but my turn signals don't?
This can still be a problem with the turn signal switch itself. However, it often points to a bad turn signal flasher relay. The hazard lights sometimes run on a separate flasher. Check the flasher relay before replacing the entire switch.
Are there any recalls for the turn signal switch on my G1500?
Searches of the NHTSA database did not show any open recalls or widespread safety campaigns for the turn signal switch specifically for the 1979-1995 GMC G1500 model years. Failures are typically due to age and normal wear.
Technical Specifications
OEM Part Numbers: 1995963 1997985
Located inside the steering column. Controls turn signals, hazard lights, and sometimes high-beams and cruise control. Requires removal of the steering wheel for access. Different versions exist for tilt vs. non-tilt columns and with/without cruise control.
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.