Quick answer
GM 1825M and GM 1899M: GM 1825M and GM 1899M are older General Motors coolant specifications from before DEX-COOL (GM 6277M, now GMW3420). 11 products in our directory list it. Buy one that names the exact code from your manual.
Key takeaways
- 11 coolants in our data list this code.
- Match the exact code and suffix in your manual, not the colour.
- A listed code is the coolant maker's claim.
Confirm the specification in your owner’s manual before buying. Product examples are not a fitment guarantee.
On this page
What the code means
GM 1825M and GM 1899M are older General Motors coolant specifications from before DEX-COOL (GM 6277M, now GMW3420). They appear in manuals for older GM vehicles.
In our directory, 11 products from 4 brands (PEAK, Recochem, Valvoline, Zerex) list this code. Chemistries their makers state: IAT (6), HOAT (3). Forms: Concentrate (5), Premix 50/50 (4), Concentrate and Premix 50/50 (2).
For the make-by-make answer, see the make guide.
Products by code
| Code | Products listing it |
|---|---|
| GM 1825M | 11 |
| GM 1899M | 9 |
Codes with a letter or number suffix are different requirements. Buy the one your manual names, not the nearest neighbour.
Coolants whose maker lists it (11)
Each row is a product whose manufacturer lists this code on its own page or datasheet (data checked 22 Oct 2026). A listed code is the maker's claim; we have not tested the products. Products with a checked Amazon listing come first.
As an Amazon Associate I earn from qualifying purchases. Commissions never change which products we list or what the data says.
How to use this list
- Find the exact code in your owner's manual, service book or equipment documentation.
- Pick a product above that lists the same code, including any letter or suffix.
- Open the product page to read the maker's exact wording ("approved", "meets" or "suitable for" are not the same).
- Do not mix chemistries. Check with the mixing checker before topping up.
Related spec codes
Chrysler MS-7170 · Ford WSS-M97B51-A1 (Gold) · Ford ESE-M97B44-A · Ford WSS-M97B57 (Yellow) and WSS-M97B55-A · VW TL 774 (G11, G12, G12+, G12++, G13, G12evo) · Mercedes-Benz MB 325 and MB 326 · All coolant specs
Frequently asked questions
Which coolants meet GM 1825M or GM 1899M?
In our directory, 11 products list it, including PEAK ORIGINAL EQUIPMENT TECHNOLOGY Antifreeze + Coolant 50/50 Prediluted for North American Vehicles - GOLD, PEAK ORIGINAL EQUIPMENT TECHNOLOGY Concentrate Antifreeze + Coolant for North American Vehicles - GOLD, PEAK ORIGINAL EQUIPMENT TECHNOLOGY Concentrate Antifreeze + Coolant for North American Vehicles - GREEN. The full list is on this page.
Can I use a universal coolant instead of GM 1825M or GM 1899M?
Only if the maker of that universal coolant lists this exact code on the label or datasheet. "Compatible with all makes" is not the same as listing the code.
Where do I find the GM 1825M or GM 1899M requirement?
In the owner's manual or service literature, usually in the fluids or capacities section, and sometimes on the reservoir cap.
How we source this page
- Facts come from manufacturer pages, datasheets, owner's manuals and standards bodies, linked under Sources.
- We do not test products, and no brand pays to be listed or ranked. Advertising and affiliate links are labelled and never change the data.
- Anything we could not find is marked "not published" rather than guessed. Spotted an error? Tell us.
Sources
- PEAK: PEAK ORIGINAL EQUIPMENT TECHNOLOGY Antifreeze + Coolant 50/50 Prediluted for North American Vehicles - GOLD (manufacturer page)
- PEAK: PEAK ORIGINAL EQUIPMENT TECHNOLOGY Concentrate Antifreeze + Coolant for North American Vehicles - GOLD (manufacturer page)
- PEAK: PEAK ORIGINAL EQUIPMENT TECHNOLOGY Concentrate Antifreeze + Coolant for North American Vehicles - GREEN (manufacturer page)
- Valvoline: Valvoline MaxLife/Multi-Vehicle Antifreeze Coolant 50/50 (manufacturer page)
- Zerex: Zerex G05 Antifreeze Coolant (manufacturer page)
- Zerex: Zerex Original Green Antifreeze Coolant (manufacturer page)
- PEAK: PEAK Conventional 50/50 Ready Use Antifreeze + Coolant (manufacturer page)
- PEAK: PEAK Conventional Concentrate Antifreeze + Coolant (manufacturer page)