Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Cadillac STS 3.6 7FACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Air Cond Compressor Oil | 4.70 OZS. | 0.13 L | PAG 46 | S | |||
| Air Cond Refrigerant | 1.40 LBS. | 0.63 KG | R-134a | S | |||
| Automatic Transmission Fluid | Drain and Refill | 7.40 QTS. | 7 L | Automatic Transmission Fluid DEXRON VI | Look for "Approved for H-Specification" on the label. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. Refer to TSB No. 04-07-30-037C, Date of Issue: April 11, 2007. | S | |
| Automatic Transmission Fluid | Overhaul | 9.40 QTS. | 8.89 L | Automatic Transmission Fluid DEXRON VI | Look for "Approved for H-Specification" on the label. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling. Refer to TSB No. 04-07-30-037C, Date of Issue: April 11, 2007. | S | |
| Brake Fluid | N/A | N/A | DOT 3 Brake Fluid | S | |||
| Differential Gear Oil | Rear,Drain and Refill,w/Cover Removal | 1.27 QTS. | 1.2 L | SAE 75W-90 Synthetic Gear Oil | GM Part No. 12378261 or equivalent meeting GM Specifications: (9986115). Add 3.38 oz. of Limited Slip Additive. | S | |
| Differential Gear Oil | Rear,Drain and Refill,w/use of Drain Plug | 1.06 QTS. | 1 L | SAE 75W-90 Synthetic Gear Oil | GM Part No. 12378261 or equivalent meeting GM Specifications: (9986115). Add 2.37 oz. of Limited Slip Additive. | S | |
| Engine Coolant | 13.00 QTS. | 12.3 L | 50/50 mixture of DEX-COOL and clean drinkable water | S | |||
| Engine Oil | 3.6L Eng | 6.00 QTS. | 5.67 L | API - SAE 5W-30 | Use synthetic oil that meets GM Standard GM4718M. DO NOT use other viscosity oils such as SAE 20W-50. | S | |
| Fuel Tank | 17.50 GALS. | 66.24 L | S | ||||
| Power Steering Fluid | N/A | N/A | GM Power Steering Fluid | GM Part No. 89021184. | S | ||
| Windshield Washer Fluid | N/A | N/A | Optikleen Windshield Washer Fluid | Follow the Manufacturer's Instructions for the mixture ratio. | S | ||
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.