diff --git a/gnss/1.1/default/GnssConfiguration.cpp b/gnss/1.1/default/GnssConfiguration.cpp
index d05f317..2717571 100644
--- a/gnss/1.1/default/GnssConfiguration.cpp
+++ b/gnss/1.1/default/GnssConfiguration.cpp
@@ -1,4 +1,7 @@
+#define LOG_TAG "GnssConfiguration"
+
 #include "GnssConfiguration.h"
+#include <log/log.h>
 
 namespace android {
 namespace hardware {
@@ -43,10 +46,33 @@
 }
 
 // Methods from ::android::hardware::gnss::V1_1::IGnssConfiguration follow.
-Return<bool> GnssConfiguration::setBlacklist(
-    const hidl_vec<::android::hardware::gnss::V1_1::IGnssConfiguration::BlacklistedSource>&) {
-    // TODO implement
-    return bool{};
+Return<bool> GnssConfiguration::setBlacklist(const hidl_vec<BlacklistedSource>& sourceList) {
+    std::unique_lock<std::recursive_mutex> lock(mMutex);
+    mBlacklistedConstellationSet.clear();
+    mBlacklistedSourceSet.clear();
+    for (auto source : sourceList) {
+        if (source.svid == 0) {
+            // Wildcard blacklist, i.e., blacklist entire constellation.
+            mBlacklistedConstellationSet.insert(source.constellation);
+        } else {
+            mBlacklistedSourceSet.insert(source);
+        }
+    }
+    return true;
+}
+
+Return<bool> GnssConfiguration::isBlacklisted(const GnssSvInfo& gnssSvInfo) const {
+    std::unique_lock<std::recursive_mutex> lock(mMutex);
+    if (mBlacklistedConstellationSet.find(gnssSvInfo.constellation) !=
+        mBlacklistedConstellationSet.end()) {
+        return true;
+    }
+    BlacklistedSource source = {.constellation = gnssSvInfo.constellation, .svid = gnssSvInfo.svid};
+    return (mBlacklistedSourceSet.find(source) != mBlacklistedSourceSet.end());
+}
+
+std::recursive_mutex& GnssConfiguration::getMutex() const {
+    return mMutex;
 }
 
 // Methods from ::android::hidl::base::V1_0::IBase follow.