http://www.s10forum.com/forum/f135/how-to-r152a-conversion-493953/#post7846652

Looks to be they're in the same situation as we are...

On 6/2/2016 15:39, Dennis Haynes wrote:
> What is R135a? I know, a type, R134a. Anyway While R152a is being used in newer vehicles instead of the R134a I do not know if it is approved for retrofit or if it is compatible with the expansion valve and other components of an R134a system. As summer is here let's do some research.
>
> Dennis

toodle pip,
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