GM chassis presents significantly different challenges than Dodge trucks:
1. IFS (Independent Front Suspension) clearance:
- Biggest Chummins challenge: GM IFS upper control arms, CV axles, and differential are positioned very differently than Dodge solid axle
- Turbo downpipe and oil drain routing must avoid IFS components
- Some swaps require modified oil pans for IFS clearance
- Our kits account for IFS geometry in piping design
2. Hood clearance (critical for GM):
- GM hoods sit lower than Dodge: Limits vertical height for turbos
- Single turbos usually fit under stock GMT800/GMT900 hoods
- Compound setups almost always require cowl hood or hood modification on GM trucks
- OBS GM trucks have slightly more hood clearance than newer models
- We provide height measurements for each turbo configuration before you order
3. Steering system interference:
- GM steering box, pitman arm, and idler arm positioned differently than Dodge
- Downpipe routing must clear GM steering linkage
- More critical on 4WD trucks due to front axle and steering overlap
4. Frame rail and crossmember differences:
- GM frame rails narrower than Dodge in engine bay area
- Crossmember placement affects oil pan and turbo bracket mounting
- Compound turbo brackets often mount to frame—GM requires different positioning
5. Intercooler piping complexity:
- GM intercoolers mount in front bumper area (like Duramax)
- Charge pipe routing from Cummins turbo to GM intercooler completely custom
- Must route around IFS, radiator, A/C condenser, GM-specific obstacles
- Our kits include piping designed specifically for GM routing challenges
6. Accessory drive and A/C:
- GM A/C compressor and power steering pump locations different from Dodge
- May need GM-specific or custom accessory brackets
- Plan during swap—turbo kit works around your accessory setup
Our recommendation: Before ordering turbo kit, send us photos of your completed Chummins swap showing: engine bay from multiple angles, IFS components, hood clearance measurement, and intercooler location. We'll confirm fitment and advise on any needed modifications.
