Quick answer: Alternator Replacement on a 2016–2025 Chevrolet Malibu is rated Moderate and takes about 2-3 hours. You'll need 8 tools for this job, and parts cost about $215. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name |
Part Number |
Price |
Buy |
| Alternator |
TRQ ALA90181 |
$214.95 |
|
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Step-by-Step Instructions
Follow these steps carefully
1
Verify Engine (1.5T vs 2.0T!)
VERIFY YOUR ENGINE BEFORE ORDERING — the amperages differ. You'll need: correct alternator for YOUR engine (130A for 1.5T, 150A for 2.0T), basic sockets, belt tool. The 2.0T's Denso has a 5-groove clutch pulley. Disconnect the NEGATIVE battery terminal first. Note belt routing.
🔧 Mechanic's note — Ray Delgado
I always verify the engine before you order — the 1.5T takes the 130A Mitsubishi and the 2.0T the 150A Denso, and they are not interchangeable. The 5-groove clutch pulley on the Denso is the quick visual tell.
2
Remove Serpentine Belt
Release the serpentine belt tensioner and slip the belt off the alternator pulley (standard GM tensioner), noting the routing — the 2.0T's 5-groove belt must align. The 1.5T's 130A unit is smaller than the 2.0T's 150A, but the procedure is the same.
3
Disconnect Electrical
Disconnect the battery cable (nut-secured) and the regulator connector — the Mitsubishi (1.5T) and Denso (2.0T) connectors differ, but both are standard. Ensure clean connections on reinstall; the internal regulator makes the plug critical.
4
Unbolt and Remove Alternator
Unbolt the alternator from its bracket, remove the mounting bolts, and extract it. The Malibu's bay is reasonably open. The 1.5T's 130A unit is compact; the 2.0T's 150A is slightly larger.
5
Install Correct-Amperage Alternator
Install the new alternator — VERIFY it's the correct amperage for YOUR engine (130A Mitsubishi for 1.5T, 150A Denso for 2.0T). Reconnect the battery cable and regulator plug. Reinstall the serpentine belt — correct routing and groove alignment.
🔧 Mechanic's note — Tom Becker
I've learned to double-check the amperage on the box before it goes in — a 130A in a 2.0T will not keep up with the electrical load. Match the unit to your engine, not to the price.
6
Reconnect Battery, Test Voltage
Reconnect the negative battery terminal, start the engine, and test charging voltage: 13.5–14.5V running. The 1.5T/2.0T split (130A vs 150A) is the defining detail — always verify your engine.
All Done!
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
- • Not disconnecting the battery before starting the repair
- • Forgetting to properly route the serpentine belt
- • Over-tightening the alternator mounting bolts
