Batt. is good eerything seems good just a really high pitched really lound wineng noise soon as i turn key...
SOURCE: 1991 Sonoma Idles high and somtimes wont idle
Check the fuel filter-they had a recall on replacement filters(fram?-just google GMC Recalls) or go to 91 GMC Sonoma Repair=many sites to tell you and download manuel. Then the library has books if you dont. Good luck and God bless1
Scoyboy
SOURCE: high pitch whistling noise in engine compartment of 2005 envoy
There may be a small hole or cut in a vacum line or possibly just loose. Also make sure the air filter box and the big hose to it are secure and clamps etc are tight. Pulleys and belts can make a high pitch sound also.
SOURCE: my 91 gmc sonoma 2.8L wont run I have gas,
check the coil for spark. If weak or dead it will not start.
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