GM GENUINE PARTS GT330
(20915842) Fuel Tank Filler Cap
Price as of 2026-06-21. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Buyers who prioritize quality over price in caps
- •Those who want a top-rated option — in the top 18% of caps by rating
- •You're on a tight budget — $16 above the category average of $14
- •ACDelco GM Original Equipment RC27 offers a better rating (4.7/5) at a similar or lower price ($15)
- •YITHSWAY Gas Cap Fuel Cap — 60% cheaper at $12 (Score B+)
- •ACDelco GM Original Equipment RC27 — higher rated at 4.7/5 ($15)
📊 Based on data analysis of 192 products in this category.
Mubboo Score: B
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other caps
Computed from live Amazon rating, review count, and price across 192 caps available to US consumers · last refreshed 2026-06-21.
How It Compares
This Product GM GENUINE PARTS GT330 | Most Popular Dorman 54201 Engine Coolant Reservoir Cap Compatible | Best Rated ACDelco GM Original Equipment RC27 | Best Value YITHSWAY Gas Cap Fuel Cap | |
|---|---|---|---|---|
| Price | $29.88 | $13.22 | $14.99 | $11.99 |
| Rating | 4.6/5 | 4.6/5 | 4.7/5 | 4.4/5 |
| Reviews | 2,701 | 4,813 | 1,950 | 2,774 |
| Mubboo Score | B | A- | B+ | B+ |
About GM GENUINE PARTS
- 12 products in our database
- Average rating: 4.7/5 across all products
- Price range: $9.99 – $230.70
- Categories: caps, engine-cooling-and-climate-control, filters-automotive, horns-and-accessories, Monitor Arms, pedals-and-pedal-accessories
Other caps
Bottom Line
GM GENUINE PARTS GT330 earns Mubboo Score B. Priced at $30 — a premium option, above the category average of $14. Rated 4.6/5 from 2,701+ reviews. Strong buy if: buyers who prioritize quality over price in caps, those who want a top-rated option. Skip if: you're on a tight budget — Dorman 54201 Engine Coolant Reservoir Cap Compatible (Score A-, $13) may fit better.
Frequently Asked Questions
Is the GM GENUINE PARTS GT330 worth buying in 2026?
It earns a Mubboo Score of B, with a 4.6/5 rating from 2,701 reviews — better than 82% of caps we track.
How much does the GM GENUINE PARTS GT330 cost?
It is currently $29.88 — premium-tier pricing for caps.
How does the GT330 compare to other caps?
The category's most-reviewed alternative is the Dorman 54201 Engine Coolant Reservoir Cap Compatible (4.6/5, 4,813 reviews, $13.22). The GT330 carries a Mubboo Score of B vs A-.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-21) and may change.