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Product Information
Product Details
Part No. 41-940
Warranty Details (7 YR REPLACEMENT IF DEFECTIVE)
ACDelco GM Original Equipment Double Platinum Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. With a copper core and double platinum pads on the center electrode, these plugs are designed to deliver long-lasting performance. ACDelco GM Original Equipment parts are the true OE parts installed during the production or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional.
Product Features:
Product Features:
- One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal that helps reduce radio frequency and engine interference, regulate spark plug energy, and protect against compression pressures for long life
- Double platinum point pad on center and ground electrode offer excellent durability and consistent voltage demands to help reduce wear on ignition system
- Pure copper core results in cooler electrode temperature for maximized durability and fouling resistance
- Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
- ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
Specifications
Approximate Resistor Value:
1-2 k
Center Electrode Core Material:
Copper
Center Electrode Design:
Fine Wire
Center Electrode Tip Material:
Platinum
Core Nose Length:
0.700 in
Electrical Terminal Type:
Non-Removable Nut
Grade Type:
Regular
Ground Configuration:
Standard
Ground Electrode Core Material:
Nickel
Ground Electrode Quantity:
1
Ground Electrode Tip Design:
Platinum
Ground Electrode Tip Material:
Platinum
Height:
1 in
Hex Size:
16 MM
Hex Type:
Hex
Indexed:
No
Insulator Height:
2.087 in
Insulator Material:
Aluminum Oxide
Length:
4.1 in
Manufacturer Heat Range:
14
Pre-Gap Size:
0.053 in
Reach:
0.689 in
Resistor Type:
Yes
Seat Type:
Tapered
Skirt:
No
Thread Diameter:
0.551 in
Washer(s) Included:
No
Weight:
.52 lb
Width:
3.5 in
4.78 out of 5
474 Customer Reviews
90% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
419
4 Stars
34
3 Stars
7
2 Stars
1
1 Star
13
Pros
38
Improves Engine Efficiency
30
Durable
29
Easy To Install
28
Increases Power
4
Lightweight
Cons
3
No Improvement In Performance
3
none
1
Difficult To Install
1
Missig When Warmerd Up
1
Ac Delco's Dbl Pro Plats
Best Uses
40
Everyday Driving
32
Replacement
17
Performance Driving
10
Restoration
6
Racing
Car & Truck
10
Casual Driver
5
Auto Enthusiast
5
Mechanic
4
Truck Enthusiast
2
Competitive Driver
Describe Yourself
17
Auto Enthusiast
17
Casual Driver
8
Truck Enthusiast
7
Mechanic
3
Competitive Driver
Most Liked Positive Review
GM Cars Love these Plugs
GM cars just love the ACDelco plugs. I've installed the more expensive spark plugs before but it did not run as good. If you have a GM Car - go with the ACDelco spark plugs and your car will run at it's best.
Most Liked Negative Review
Garbage
I bought these to replace the factory type CR43TS plugs for my suburban and they didn't last 100k miles by any means. They lasted about 30k and started having engine performance issues.
Replaced these plugs back to a new set of CR43TS and engine immediately ran better. The stock plugs lasted longer and were 1/3 of the price
Reviewed by 474 Customers
Wrong Plug!!!
Staff Reviewer -
Product was not faulty, plugs were new. Online part matching was incorrect! DON'T TRUST EVERYTHING YOU READ ON THE INTERNET! I went to the store after installation (plugs were in for 30 minutes throwing multiple cylinder misfire codes) and an employee was able to tell me double platinum is not recommended (despite the recommendation from the website) for my 05 2500HD. I needed Iridium. After a quick swap in store and re-install I was on my way with no issues. I would recommend calling into a store prior to purchasing to ensure you have the right plug. I have been doing tune ups for some time now (decades) and this is the first time I have experienced this. I would recommend ACDELCO to a friend as long as they are the right plug.
Bottom Line Yes, I would recommend to a friend
this spark plug is the best
Staff Reviewer -
I work as a automotive tech I can honestly say these spark plugs are one of the best. I have had my set in my truck for about 60K miles and still going strong.
Bottom Line Yes, I would recommend to a friend
ACDelco Plugs
Staff Reviewer -
These plugs are rated for 100,000 miles however in my 1999 Chevy Malibu I have had to replace them about every 50,000 miles to maintain peak performance. They are pre gapped and every one checked out perfect on gap right out of the box.
Bottom Line Yes, I would recommend to a friend
Great Plug
Staff Reviewer -
The gap on the plugs were suppose to be pre set at 0.60 but they were set at 0.40 I set the proper gap installed plugs, truck runs better than it has in years. I have 2004 Silverado 5.3 engine, 122,000 miles. The valves even quit taping. Have been using a differant brand. Just hope these hold up better to water than the brand I was using, because water killed them.
Bottom Line Yes, I would recommend to a friend
Garbage
Staff Reviewer -
I bought these to replace the factory type CR43TS plugs for my suburban and they didn't last 100k miles by any means. They lasted about 30k and started having engine performance issues.
Replaced these plugs back to a new set of CR43TS and engine immediately ran better. The stock plugs lasted longer and were 1/3 of the price
Bottom Line No, I would not recommend to a friend
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