



⚙️ Drive with confidence—because your engine deserves the pro touch!
The ACDelco 38158 Professional Automatic Belt Tensioner and Pulley Assembly ensures precise belt tension and alignment using a patented vibration damping system and torsional round spring design. Engineered from premium materials, it offers enhanced durability and broad compatibility across domestic, import, and heavy-duty vehicles. Backed by General Motors, this OEM-quality part guarantees long-lasting performance and reliability for your accessory drive system.





| Manufacturer | ACDelco | 
| Brand | ACDelco | 
| Model | Drive Belt Tensioner | 
| Product Dimensions | 22.35 x 12.19 x 9.14 cm; 453.59 g | 
| Item model number | 38158 | 
| Exterior | Machined | 
| Manufacturer part number | 88929140 | 
| OEM Part Number | 88929140 | 
| Item Weight | 454 g |