GM 21075686 / 11561878 Replacement Push Rivets – 8mm Black Nylon Rocker & Fender Liner Clips, 15mm Head
GM 21075686 / 11561878 Replacement Push Rivets – 8mm Black Nylon Rocker & Fender Liner Clips, 15mm Head
In stock Ships in 1–2 business days 14-day returns
Ordering several packs? Quantities in the Bulk Discounts table count packs of the size you pick below, not rivets. The discount applies automatically in the cart. Buying single rivets? Quantities in the Bulk Discounts table below count single rivets. The discount applies automatically in the cart.
Bulk Discounts
| Quantity | Price per unit |
|---|---|
| Buy 1 – 49 | $7.99 /each |
| Buy 50 – 499 | $7.19 /each |
| Buy 500 – 999 | $6.39 /each |
| Buy 1000 – 2499 | $5.59 /each |
| Buy 2500 – 4999 | $4.79 /each |
| Buy 5000 + | $4.00 /each |
50 rivets for $7.99 · $0.16 each · save 36% vs singles
Fits 8 mm (5/16″) holes · 15 mm head · Used on Chevrolet, GMC, Cadillac, Hummer, Pontiac, Saturn, Oldsmobile
Not sure? A 5/16″ drill bit that just slips through the hole confirms 8 mm. Check your vehicle
- Ships in 1–2 business days from South Carolina
- USPS with tracking · typically 2–5 days after shipment
- Black UV-resistant nylon
- 14-day returns on unopened packs · wrong or damaged item replaced free (report within 7 days)
Product details
Aftermarket replacement for GM OEM part 21075686 (cross-referenced with 11561878) — the 8mm nylon push retainer GM used for decades on rocker panels, wheel liners, air inlet ducts, and cowl grilles. Identical 8mm shank, 15mm head, ~20mm length.
Used across the GM lineup including
Chevrolet Silverado / C-K 1500-3500, Tahoe, Suburban, Colorado, Avalanche, S-10 • GMC Sierra, Yukon, Canyon, Sonoma, Envoy, Jimmy, Savana • Cadillac Escalade • Hummer H2 • Pontiac Firebird, Grand Prix, G6, Sunfire • Saturn S-Series and L-Series • Oldsmobile Aurora, Bravada
Common locations
- Rocker panel and wheelhouse liner retainers
- Air inlet duct and cowl grille fasteners
- Splash shield and baffle retainers
Specs
- 8mm shank — fits 8mm (5/16") holes
- 15mm head, black UV-resistant nylon
- Replaces GM 21075686 / 11561878
Sold individually or in 50–1000 packs.
Fit check and install
- Measure the panel hole: these rivets fit an 8mm (5/16") hole. A hole of a different size needs a different rivet.
- To remove an old rivet, work a trim-clip tool or forked pry tool under the head and lift it straight out.
- To fit a new one, line up the panel and frame holes and push the rivet in until the head sits flat; the legs expand behind the panel to hold it.
- Use a new rivet each time: removal deforms the legs.
Pack sizes: 50 Pack, 100 Pack, 250 Pack, 500 Pack, 1000 Pack, Single Rivet.
What’s in the pack
50, 100, 250, 500 or 1,000 identical push rivets per pack, or a single rivet.
- 8mm shank — fits 8mm (5/16") holes
- 15mm head, black UV-resistant nylon
- Replaces GM 21075686 / 11561878
- 50 Pack One full ATV plastic refresh (30–40 rivets) $7.99 $0.16/rivet · save 36%
- 100 Pack A UTV refresh with doors & bed (40–60), or two ATVs $10.99 $0.11/rivet · save 56%
- 250 Pack Up to five ATV refreshes $17.99 $0.072/rivet · save 71%
- 500 Pack Five or more UTVs, or a small fleet $27.99 $0.056/rivet · save 77%
- 1000 Pack Best value Shops: keep one on the shelf $42.99 $0.043/rivet · save 82%
- 1 rivet A clip or two (single orders are final sale) $0.25 $0.25/rivet
Rivet counts come from our quantity calculator and include about 15% spares.
How to install
-
Measure the hole
Pop out one old clip and measure the panel hole, not the old rivet. A 5/16″ drill bit that just slips through confirms 8 mm.
-
Line up the panel
These hold a combined panel stack of roughly 2–6 mm.
-
Press in a fresh rivet
Fresh rivets press in by hand in seconds. Don’t reuse old ones: removal deforms the legs.
Machines named in this listing
| Make | Models |
|---|---|
| Chevrolet | Silverado / |
| GMC | Sierra, Yukon, Canyon, Sonoma, Envoy, Jimmy, Savana |
| Cadillac | Escalade |
| Hummer | H2 |
| Pontiac | Firebird, Grand Prix, G6, Sunfire |
| Saturn | S-Series and L-Series |
| Oldsmobile | Aurora, Bravada |
Any 8 mm (5/16″) hole takes this rivet. Not listed? Check your machine.
How many rivets do I need?
Pick a job from our quantity calculator, or type your own count. We find the cheapest mix of packs at today’s list prices (any bulk-tier discount is applied later, in the cart).
Will These Fit My Machine?
Type your year, make, and model to check fitment instantly.
Vehicle fitment guides
Vehicle guides that point to this listing. Each has its own details and a buy box.
- Chevrolet Silverado 15001999–2026
- Chevrolet Silverado 2500HD2001–2026
- Chevrolet Tahoe1995–2026
- GMC Sierra 15001999–2026
- GMC Yukon1992–2026
- Chevrolet Colorado2004–2026
- Cadillac Escalade1999–2026
- Chevrolet Avalanche2002–2013
- Chevrolet Suburban1992–2026
- GMC Canyon2004–2026
- Pontiac G62005–2010
- Pontiac Grand Prix1997–2008
388 vehicle guides in all. Every machine A–Z · Fitment lookup
Replaces These OEM Part Numbers
Direct aftermarket replacement for the following factory fasteners.
| Manufacturer | OEM Part Number |
|---|---|
| GM | 21075686 |
| GM | 11561878 |
Specifications
| Shank Diameter | 8mm (fits 8mm / 5/16" holes) |
|---|---|
| Head Diameter | 15mm |
| Overall Length | 21mm |
| Material | Black UV-resistant nylon |
| Style | Push-in expansion rivet |
| Reusable | No — replace after removal |
Questions before you buy
Do I need a removal tool?
No special tool is needed. To take a panel off, pop the center pin and the rivet comes out. Fresh rivets press in by hand in seconds.
Are push rivets reusable?
No. Removal deforms the legs, so always install a fresh rivet.
What hole size do these fit?
8 mm (5/16″) holes, with a combined panel stack of roughly 2–6 mm. The head is 15 mm. A 5/16″ drill bit that just slips through the hole confirms 8 mm; if your hole is 9 mm or 10 mm, these are not your clip.
How many rivets do I need?
A single fender flare takes 4–8, a pair of side panels 6–8, a full ATV plastic refresh 30–40 and a full UTV refresh with doors and bed 40–60. Add about 15% spares for breakage and drops. Quantity calculator
How fast do you ship?
Orders ship in 1–2 business days from South Carolina by USPS with tracking, typically arriving 2–5 days after shipment. Shipping policy
Can I return them?
Unopened packs can be returned within 14 days of delivery with prior authorization (contact us with your order number first). Authorized returns carry a 20% restocking fee and the buyer pays return shipping. Opened packs and single-rivet orders are final sale. If we ship the wrong item or it arrives damaged, send a photo within 7 days and we replace it at no cost. Refund policy