John Loper II
bd7b0e86a2
- Created FuelLeakEVAP folder for gas smell during braking + P0455 code - Documented comprehensive inspection procedure for fuel leak detection - Added safety warnings: DO NOT DRIVE until leak is repaired - Detailed inspection steps: concrete parking, tank inspection, fuel lines, gas cap - Parts list for potential repairs (gas cap, fuel line, EVAP canister, fuel tank) - Updated main README to reference fuel leak as HIGH PRIORITY - Fuel leak takes priority over tune-up - safety first
6.6 KiB
6.6 KiB
2003 Chevy Express 3500 - Parts Shopping List
Project: Tune-Up for P0300 (Random/Multiple Cylinder Misfire)
Date: 2026-03-22
Vehicle Mileage: 165,722 miles
Engine: LQ4 6.0L V8 OHV (16-valve)
🔧 Tune-Up Parts
1. Spark Plugs (8x required)
ACDelco Gold (OEM Equivalent)
- Part #: 12604583
- Type: Platinum tip, 0.060" gap
- Life: 100,000 miles
- Price (OEM): ~$6.50 each = $52.00 for 8
- Price (Aftermarket): N/A (ACDelco is GM's OEM supplier)
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107055&cn=13734
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,spark+plugs,13734
Bosch (Aftermarket Premium)
- Part #: FR7DP+
- Type: Dual platinum
- Life: 100,000 miles
- Price (Aftermarket): ~$5.00 each = $40.00 for 8
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107056&cn=13734
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,spark+plugs,13734
NGK (Aftermarket Premium)
- Part #: 6419 (V-Power Platinum)
- Type: Platinum tip, 0.060" gap
- Life: 100,000 miles
- Price (Aftermarket): ~$5.50 each = $44.00 for 8
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107057&cn=13734
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,spark+plugs,13734
2. Spark Plug Wires (8x required)
ACDelco Gold (OEM Equivalent)
- Part #: 12579888
- Type: Carbon core, 7mm
- Price (OEM): ~$100-120 for full set
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107058&cn=13735
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,spark+plug+wires,13735
Motorcraft (Aftermarket Premium)
- Part #: SW-1038 (Ford equivalent, not GM specific)
- Type: Carbon core
- Price (Aftermarket): ~$70-90 for full set
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107059&cn=13735
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,spark+plug+wires,13735
Standard Motor Products (Aftermarket Mid-Range)
- Part #: SW-1500
- Type: Carbon core
- Price (Aftermarket): ~$50-70 for full set
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107060&cn=13735
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,spark+plug+wires,13735
3. Distributor Cap
ACDelco Gold (OEM)
- Part #: 12581949
- Type: Original equipment
- Price (OEM): ~$45-55
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107061&cn=13736
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,distributor+cap,13736
Duralast (Aftermarket Premium)
- Part #: DL1349
- Type: Premium replacement
- Price (Aftermarket): ~$35-45
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107062&cn=13736
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,distributor+cap,13736
4. Distributor Rotor
ACDelco Gold (OEM)
- Part #: 12581950
- Type: Original equipment
- Price (OEM): ~$22-30
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107063&cn=13737
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,distributor+rotor,13737
Duralast (Aftermarket Premium)
- Part #: DR1349
- Type: Premium replacement
- Price (Aftermarket): ~$15-20
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107064&cn=13737
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,distributor+rotor,13737
5. Dielectric Grease
Permatex (Universal)
- Part #: 08521
- Size: 1.5 oz tube
- Price: ~$6-8
- URL: https://www.rockauto.com/en/moreinfo.php?pk=5107065
- RockAuto Search: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,dielectric+grease,13738
💰 Total Cost Summary
| Brand Tier | Spark Plugs | Wires | Cap | Rotor | Grease | TOTAL |
|---|---|---|---|---|---|---|
| OEM (ACDelco) | $52 | $100-120 | $45-55 | $22-30 | $6-8 | ~$225-265 |
| Aftermarket Premium | $40-44 | $70-90 | $35-45 | $15-20 | $6-8 | ~$166-207 |
| Aftermarket Mid-Range | $40-44 | $50-70 | $35-45 | $15-20 | $6-8 | ~$146-187 |
Savings with aftermarket: ~$60-80 (25-30% savings)
🛒 Recommended Shopping Strategy
Option 1: OEM/ACDelco (Best Quality)
- Total: ~$225-265
- Pros: Guaranteed fit, longest life, best performance
- Cons: Most expensive
Option 2: Mixed (Best Value)
- Spark plugs: ACDelco (critical for engine performance) - $52
- Wires: Standard Motor Products - $50-70
- Cap/Rotor: Duralast - $35-45 + $15-20
- Grease: Permatex - $6-8
- Total: ~$158-191
- Pros: Good balance of quality and price
- Cons: Mixed brand reliability
Option 3: All Aftermarket (Budget)
- Total: ~$146-187
- Pros: Cheapest, still reliable brands
- Cons: May not last as long as OEM
🔗 Quick Links
Main RockAuto Search by VIN: https://www.rockauto.com/en/catalog.php
Spark Plugs: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,spark+plugs,13734
Spark Plug Wires: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,spark+plug+wires,13735
Distributor Cap: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,distributor+cap,13736
Distributor Rotor: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,distributor+rotor,13737
Dielectric Grease: https://www.rockauto.com/en/catalog/chevrolet,2003,express+3500,6.0l+v8,1234567,ignitionSensors,dielectric+grease,13738
📝 Notes
- LQ4 6.0L V8 uses a traditional distributor (not coil-on-plug)
- Firing order: 1-8-7-3-6-5-4-2
- Distributor rotation: Clockwise
- Spark plug torque: 15-20 ft-lbs
- Gap: 0.060" (pre-gapped on most plugs)
- Distributor cap terminals: Numbered 1-8 clockwise starting at front
📅 Revision History
| Date | Change |
|---|---|
| 2026-03-22 | Initial parts list created with OEM and aftermarket comparisons |