1. Chevrolet Climate Controls & Control Units To Buy
  2. sku: 11629460627958604
  3. STANDARD PRODUCTS 91817NXSH

STANDARD MOTOR PRODUCTS 91817NXSH Selector Switch Smp A/c

fits make: Chevrolet. year: 1978–1990.

91817nxsh Standard Motor Products For 1978-1990 Chevrolet G20 A/c Selector Switch Smp 1988 1989 1986

( Brand: Standard Motor Products ), ( Manufacturer Part Number: 91817NXSH ), ( Part Type: Switch Motor ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: A/c Selector Switch ), ( Years: 1988 1989 1990 1986 1978 1979 1980 1981 1982 1983 1984 1985 1987 ), ( Application: Chevrolet G20 A/c Selector Switch ), ( Cs-sku: 400 )

Review STANDARD MOTOR PRODUCTS Chevrolet A/c Selector Switch Smp fits G20 1978–1990

The **Standard Motor Products 91817NXSH** is a high-quality, direct-fit replacement for the air conditioning selector switch assembly found in **1978 through 1990 Chevrolet G20 trucks**, including specific models from **1986, 1988, and 1989**. Engineered to restore both functionality and reliability, this switch is meticulously designed to match the original equipment specifications, ensuring seamless integration with the vehicle s climate control system. Crafted from durable, long-lasting materials, the 91817NXSH features a robust internal wiring harness and a precision-molded plastic housing that resists wear, cracking, or degradation over time. The switch includes a **multi-position lever mechanism** that allows for precise control of the air conditioning, defroster, and fan speed settings, providing drivers with the same intuitive operation as the factory unit. Whether adjusting for optimal cabin temperature, clearing foggy windows, or regulating airflow, this switch delivers smooth, responsive performance without the risk of intermittent failures or loose connections that plague aftermarket alternatives. Ideal for both professional mechanics and DIY enthusiasts, the 91817NXSH is a **direct plug-and-play replacement**, requiring no additional modifications or wiring adjustments, making installation straightforward and hassle-free. By restoring the original functionality of the climate control system, this switch enhances comfort, safety, and overall driving experience in your Chevrolet G20, ensuring reliable operation in all weather conditions.

### **Pros and Cons of buying a Standard Motor 91817NXSH A/C Selector Switch for 1978 1990 Chevrolet G20**

#### **Pros:**

1. **Direct Fitment** This part is specifically designed for the 1978 1990 Chevrolet G20, ensuring compatibility without modifications. It includes the correct wiring harness and mounting points for a seamless installation.

2. **Reliability** Standard Motor is a well-known manufacturer of automotive electrical components, known for producing durable and long-lasting parts. The 91817NXSH is a common replacement for failing original switches, reducing the risk of premature failure.

3. **Functionality** The switch includes all necessary functions for the G20 s air conditioning system, such as fan speed control, temperature adjustment, and A/C on/off operation. It replaces the original selector knob and lever mechanism, restoring full functionality.

4. **Ease of Installation** The part comes pre-wired and often includes mounting hardware, making it easier for DIYers to install without extensive tools or electrical knowledge. Replacement typically takes less than an hour.

5. **Cost-Effective** Compared to rebuilding or replacing the entire dashboard or wiring harness, this switch is a budget-friendly solution. It avoids the labor costs associated with professional repairs.

6. **Availability** As a widely used part, it is readily available through online retailers, auto parts stores, and specialty suppliers. This ensures quick replacement if the original fails again.

7. **Compatibility with Common Years** The part fits multiple model years (1986 1989, with some overlap into 1988 and 1990), making it a versatile choice for owners of these vehicles.

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#### **Cons:**

1. **Potential Wiring Issues** If the original wiring harness or connectors are damaged, the new switch may not function correctly. Inspecting and cleaning the wiring before installation is crucial to avoid recurring problems.

2. **Age of the Vehicle** Older G20s may have worn or corroded wiring behind the switch, which could cause intermittent issues even with a new switch. This might require additional troubleshooting or repairs beyond the switch replacement.

3. **Limited Customization** This is a standard replacement part and does not offer modern upgrades (e.g., Bluetooth integration, digital displays, or programmable settings). If you re looking for enhanced features, this part won t provide them.

4. **Quality Variability** While Standard Motor is reputable, counterfeit or lower-quality knockoffs may exist in the aftermarket. Purchasing from a trusted seller (e.g., RockAuto, Amazon, or a local auto parts store) reduces this risk but isn t entirely eliminated.

5. **Possible Additional Repairs** If the switch fails shortly after installation, it could indicate deeper issues (e.g., a faulty ground, blown fuse, or damaged relay). This might require further diagnosis and repair, adding to the overall cost.

6. **Physical Wear on Dashboard** The switch mounts into the dashboard, and repeated installation/removal (e.g., during repairs) could weaken the surrounding plastic or cause misalignment. This is more of a concern for frequent DIYers than casual replacements.

7. **No Warranty on Installation** The part itself may come with a limited warranty (e.g., 30 90 days), but labor is not covered. If installation goes wrong, you ll need to address it yourself or pay for professional help.

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### **Conclusion**

The **Standard Motor 91817NXSH A/C selector switch** is a **highly recommended replacement** for the 1978 1990 Chevrolet G20 due to its direct fit, reliability, and ease of installation. It is the most practical solution for restoring air conditioning functionality without major modifications. However, it is not a "set-and-forget" part proper wiring inspection and a clean installation are essential to ensure long-term performance.

For most owners, the **pros outweigh the cons**, making this a cost-effective and efficient fix. If you encounter persistent issues after installation, it may indicate underlying electrical problems that should be addressed separately.

### **Recommendation:**

- **Buy from a trusted supplier** (e.g., RockAuto, Amazon, or a local auto parts store with good reviews) to avoid counterfeit parts.

- **Inspect the wiring harness and connectors** before installation to ensure they are clean and free of corrosion.

- **Follow the installation instructions carefully**, and consider consulting a wiring diagram if unsure about connections.

- **Test the switch thoroughly** after installation to confirm all functions (fan speeds, A/C on/off, temperature control) work as expected.

- **Keep a backup fuse or relay** on hand in case of electrical issues post-installation.

If the switch fails within the warranty period, return it for replacement. For long-term reliability, ensure the rest of the vehicle s electrical system is in good condition. This part is ideal for restoring basic functionality without unnecessary complexity.

Details:

12 Month Warranty Fitment Notes: Vehicle: 1978 1990 Chevrolet G20. Parts Geek - For 1978 1990 Chevrolet G20 A/C Selector Switch SMP 91817NXSH 1988 1989 1986: Review Fitment Notes to Ensure Proper Fit condition: New Brand: Standard Motor Products Notes: Features: Copper alloy conductors ensure superior electrical conductivity with low restive losses.

part #: 91817nxsh price

  • $57.64

specifications chvyacheatercontrols:

  • for makes: Chevrolet
  • for years: 1978-1990
  • brand: Standard Motor Products
  • mpn: 91817nxsh
  • part type: Switch Motor
  • manufacturer warranty: 12 Month Warranty
  • notes: A/c Selector Switch
  • years: 1988 1989 1990 1986 1978 1979 1980 1981 1982 1983 1984 1985 1987
  • application: Chevrolet G20 A/c Selector Switch
  • cs-sku: 400

general chvyacheatercontrols:

  • Car Truck Parts Accessories > Air Conditioning Heating > HVAC Controls Control Units
  • condition: New

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  • availability: In Stock
  • started: April 16, 2026
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for makes: chevrolet, for years: 1978-1990, part type: switch motor, manufacturer warranty: 12 month warranty, notes: a/c selector switch, years: 1988 1989 1990 1986 1978 1979 1980 1981 1982 1983 1984 1985 1987, application: chevrolet g20 a/c selector switch, cs-sku: 400,
category: auto parts > car truck parts accessories > air conditioning heating > hvac controls control units, sku: 11629460627958604,
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  • New. Offer #1 priced at $57.64 + $0.00 shipping estimate = $57.64* total. Copper alloy conductors ensure superior electrical conductivity with low resistive losses. Notes: A/C Selector Switch.FREE SHIPPING

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